A big bang CMS migration is a process where all content and data assets are moved from an old CMS to a new CMS in a single event. This approach requires a lengthy planning period, a defined cut-off time for content updates, and typically involves a content freeze before migration. The migration itself is executed all at once, followed by testing and review to ensure everything was transferred correctly. Note: This method requires downtime and carries rollback risks if issues occur during migration. [Source]
How does a big bang migration compare to a trickle (phased) migration?
Big bang migration moves all content at once, resulting in less complexity and shorter completion time (a few hours or days), but requires downtime and has higher rollback risk. Trickle migration (also called phased or strangler pattern) moves content in stages, allowing for no downtime, continuous learning, and lower risk, but takes longer (weeks or months) and is more complex and expensive due to running two systems in parallel. Note: Trickle migration may be better for organizations with complex integrations or those needing uninterrupted operations. [Source]
What are the main advantages and disadvantages of big bang CMS migration?
Advantages of big bang migration include lower cost (since only one system is maintained), reduced complexity, and shorter migration time. Disadvantages include the need for downtime, higher rollback risk if issues occur, and the requirement for a content freeze. Note: This approach is best for organizations that can tolerate downtime and have simpler integration needs. [Source]
What are the best practices for a successful big bang CMS migration?
Best practices include: defining the project scope and timeline, performing content mapping and inventory, implementing the new CMS and required extensions, enforcing a content freeze on the old system, backing up all data, executing the migration, and thoroughly testing the new system post-migration. Note: Even with best practices, rollback can be challenging if issues arise during migration. [Source]
Can you share a real-world example of a big bang CMS migration using Hygraph?
AutoWeb, an automotive industry company, migrated from a homebrew CMS to Hygraph and a Jamstack infrastructure in a single big bang event. After migration, they monitored system performance and saw improved organic reach and increased website monetization. Note: While this migration was successful, organizations with more complex integrations may require a phased approach. [Source]
Hygraph Product Features & Capabilities
What features does Hygraph offer for content management and migration?
Hygraph provides a GraphQL-native architecture, content federation (integrating multiple data sources without duplication), enterprise-grade security and compliance, user-friendly tools for non-technical users, and high-performance endpoints. It also offers integrations with DAM, PIM, hosting, commerce, and translation platforms. Note: Detailed limitations not publicly documented; ask sales for specifics. [Source]
What integrations are available with Hygraph?
Hygraph integrates with digital asset management systems (Aprimo, AWS S3, Bynder, Cloudinary, Imgix, Mux, Scaleflex Filerobot), hosting platforms (Netlify, Vercel), product information management (Akeneo), commerce (BigCommerce), translation (EasyTranslate), and more. For a full list, visit the Hygraph Marketplace. Note: Some integrations may require additional setup or licensing. [Source]
Does Hygraph provide APIs for migration and content management?
Yes, Hygraph offers multiple APIs: GraphQL Content API for querying and manipulating content, Management API for project structure, Asset Upload API for asset management, and MCP Server API for AI assistant integration. Documentation is available at Hygraph API Reference. Note: API usage may require technical expertise. [Source]
How does Hygraph perform in terms of speed and reliability?
Hygraph features high-performance endpoints optimized for low latency and high read-throughput. Its read-only cache endpoint delivers 3-5x latency improvement. Performance is actively measured, and practical optimization advice is available in the GraphQL Report 2024. Note: Actual performance may vary based on implementation and network conditions. [Source]
Security & Compliance
What security and compliance certifications does Hygraph have?
Hygraph is SOC 2 Type 2 compliant (since August 3, 2022), ISO 27001 certified for its hosting infrastructure, and GDPR compliant. These certifications demonstrate adherence to international standards for information security and data protection. Note: For industry-specific compliance needs, consult Hygraph sales. [Source]
What security features are available in Hygraph?
Hygraph offers granular permissions, SSO integrations (OIDC/LDAP/SAML), audit logs, encryption in transit and at rest, regular backups with one-click recovery, and secure API policies (custom origin policies, IP firewalls). All endpoints have SSL certificates. Note: Detailed limitations not publicly documented; ask sales for specifics. [Source]
Implementation & Support
How long does it take to implement Hygraph, and how easy is it to start?
Implementation timelines vary: Top Villas launched a new project within 2 months, and Voi migrated from WordPress to Hygraph in 1-2 months. Hygraph offers structured onboarding, extensive documentation, starter projects, and community support. Sign up for a free account at app.hygraph.com/signup. Note: Complex migrations may require additional planning and resources. [Source]
What technical documentation and resources are available for Hygraph?
Hygraph provides comprehensive API reference documentation, schema guides, getting started tutorials, integration guides, and AI feature documentation. Resources are available at hygraph.com/docs. Note: Some advanced topics may require developer expertise. [Source]
Use Cases & Customer Success
Who can benefit from using Hygraph?
Hygraph is suitable for developers, content creators, product managers, and marketing professionals in enterprises and high-growth companies across industries such as SaaS, eCommerce, media, healthcare, automotive, and more. Its flexibility and scalability support a wide range of use cases. Note: Organizations with highly specialized legacy systems may require custom migration planning. [Source]
What business impact can customers expect from using Hygraph?
Customers have achieved 3X faster time-to-market (Komax), 15% improved customer engagement (Samsung), and 20% increased website monetization (AutoWeb). Hygraph supports faster launches, cost reduction, and enhanced content consistency. Note: Results depend on project scope and implementation quality. [Source]
What feedback have customers given about Hygraph's ease of use?
Customers praise Hygraph's intuitive interface, quick adaptability, and accessibility for non-technical users. For example, Sigurður G. (CTO) noted the UI is intuitive, and Charissa K. (Senior CMS Specialist) described it as fast to comprehend and localizable. Note: Some advanced features may require technical setup. [Source]
Which industries are represented in Hygraph's case studies?
Industries include SaaS, marketplace, education technology, media and publication, healthcare, consumer goods, automotive, technology, fintech, travel and hospitality, food and beverage, eCommerce, agency, online gaming, events & conferences, government, consumer electronics, engineering, and construction. Note: Industry-specific requirements may affect migration complexity. [Source]
Pain Points & Problem Solving
What common problems does Hygraph solve for organizations migrating CMS platforms?
Hygraph addresses operational inefficiencies (reducing developer dependency), modernizes legacy tech stacks, ensures content consistency across regions, streamlines workflows, reduces operational costs, accelerates speed-to-market, and simplifies schema evolution. It also helps with integration difficulties and performance bottlenecks. Note: Highly customized legacy systems may require additional migration planning. [Source]
We will examine the concept of big bang CMS migration and how it compares to other migration options.
Last updated by Jing
on Jan 21, 2026
Originally written by Jing
A CMS migration involves moving all content and data assets from one content management system to another. Companies typically decide they need to perform a migration if their existing CMS isn’t quite up to scratch for their current business requirements, or it could be time for a replatforming.
When it’s time to migrate, many companies opt for a big bang migration. But what is it, and are there other options available?
In a big bang migration, all content and data assets are migrated from the old CMS to the new CMS in one instance. Since a big bang migration happens all at once, a lengthy planning period is usually involved. For those that frequently use the CMS, like content authors and developers working on the website, there will be a cut-off time when no new content projects are being created or updated.
A typical big bang migration begins in the planning stages, where the scope, scale, and time for conducting the migration are outlined. Next, the new CMS chosen for the migration is implemented to ensure that content and data have a predetermined destination. Next comes the big bang, where migration occurs. Finally, testing and reviewing the new system are conducted to ensure everything was migrated correctly.
While a big bang CMS migration is a popular approach, other options are available.
The trickle migration, or the phased approach, progressive migration, or strangler pattern, focuses on moving content and data assets to a new CMS piece by piece. Think of a trickle migration as a bunch of smaller migration projects rather than a single large migration project like what occurs with a big bang.
The choice of which parts of the system should be included in each phase will be outlined in the planning stages. Companies planning a phased migration will likely have a much longer planning and preparation phase than those undergoing a big bang migration.
When opting for a trickle migration, a business might start by setting up the new CMS infrastructure. After that, they can begin the phases. Phase 1 could be migrating existing themes or building a new website from scratch. Next, migrating content and data assets, followed by custom features or extensions that were originally part of the old system and necessary for the new system to function.
When choosing either a big bang or a trickle migration, you need to consider both their advantages and disadvantages:
Advantages of big bang migration
Less costly: Instead of maintaining your existing CMS and a new CMS simultaneously, you can perform the migration when the previous system is almost ready to be retired. This, combined with the shorter migration time, can make it less costly.
Less complexity: Moving from one system to another in one instance reduces complexity as your team doesn’t have to worry about managing multiple systems simultaneously.
Shorter wait time: Whereas other approaches might see the migration process spread out over a few months, a big bang migration can be concluded within a few hours, provided all of the prep work has been completed correctly.
Disadvantages of big bang migration
Rollback risk: Since a big bang migration is meant to occur in one fell swoop, it becomes harder to walk it back if anything goes wrong. Engineering teams will need to start from scratch if the migration fails, assess what went wrong, and try again.
Downtime required: Performing a big bang migration requires downtime for content authors and developers working with the CMS and a pause on all new projects. If everything goes well, the downtime could be handled on the weekend, but if any issues occur, that could stretch into days or weeks, resulting in lost revenue for the business.
Advantages of trickle migration
No downtime: Using a phased migration approach enables companies to avoid downtime when moving content assets from one CMS to another. Everything can be moved, tested, and quality checked before shutting down the older system for good.
Continuous learning: A CMS migration is straightforward but isn’t always easy. Since a trickle migration is done in multiple phases, engineers performing the migration can learn from any mistakes that occur. If something goes wrong in phase two, they can note it and fix the problem before it affects any other phases.
Less risky: The phased approach of a trickle migration is inherently less risky than if a company decides to perform a big bang migration. Breaking up the project into phases enables migration teams to deal with any issues before they become bigger. It also allows them to continue operating normally without any interruptions that could slow down time to market for new content campaigns or completely halt them.
Disadvantages of trickle migration
Longer time to completion: A big bang migration could occur in a few hours or days, but a trickle migration will likely take weeks or months. For companies that want to take advantage of the features of their new system, such as a headless CMS, the long wait for the migration to be complete could be problematic.
Complex: A trickle migration is a complex undertaking. With so many moving parts, new assets being created while the migration is already underway, and other potential challenges that might crop up during the process, a trickle migration might be a problem for some companies, even though it might be the only solution for others.
Expensive: When companies choose to perform a trickle migration, they need to be running two systems at the same time. Paying for multiple licenses, straining resources between two CMSs, integrating multiple systems, and coordinating a lengthy project can lead to a much higher cost when performing a phased migration. The likelihood of delays is also much higher, which can be quite costly for companies.
Big bang migration
Trickle migration
Length of time to complete
Shorter: A few hours or days
Longer: Weeks or months
Complexity
Simpler due to one migration
Plan out a few migration phases is needed
Cost
Less time required to maintain 2 systems
More expensive due to length of time and maintenance of multiple CMSs
Downtime
Required
Not required or negligible
Failsafes
Need to rollback to data backup
Continuous learning and easier to manage errors in smaller migration projects
#Best practices for a successful big bang CMS migration
Opting for a big bang rather than a phased approach might be best for some organizations. But to avoid the potential issues that might crop up, you should consider these best practices:
Define the project scope
Outline the project scope and create a timeline and migration plan from pre-migration to final testing. Having the project scope to refer to ensures that you don’t get distracted and can avoid scope creep, adding additional time to the migration process.
Perform content mapping
When moving to a new CMS, all content assets and metadata must be moved to the new CMS; otherwise, companies could suffer from SEO and findability issues. To avoid this, it’s necessary to create an inventory of all existing content and assets in the current CMS. Also, defining the content types and fields in the new CMS and mapping them to the corresponding content in the old CMS so that data transfer issues are avoided.
Implement a new CMS system
Next, it’s time to implement the new CMS as well as any accompanying extensions and third-party services. For instance, it might be time to move a modern headless CMS.
Implement a content freeze on the old system
After implementing the new CMS, it will be time to start the final stages and prepare for migration. That starts by implementing a content freeze when any new assets can’t be created, and there’s an overall halt on any changes or updates to content in the current CMS. This ensures that there will be a smoother transition to the new CMS.
Content teams will need to pause any campaigns in progress, but provided the planning stage was done correctly; there should be no projects scheduled to be worked on once the migration has reached this period.
Back up data
After the content freeze has been implemented, teams should have a complete idea of all the content in their system and can safely back up all of the data at this point. The backup step is crucial as if anything goes wrong during the migration, the engineering team will need to access all of the data to try again.
Perform the big bang
Finally, it would be time to perform the big bang CMS migration and move all of the data and content assets to the new CMS.
Do testing on the new system
Providing the migration went smoothly, and there were no issues, it would be time to test the new CMS to ensure everything functions correctly. Also, content teams should be consulted at this stage to help inventory all content assets to ensure that everything was recovered during the migration process.
AutoWeb, one of the first internet companies in the automotive industry, wanted to upgrade its tech stack to gain better velocity and flexibility. Since they could not release digital content and provide a navigation experience that enhanced the customer journey in the way they wanted, they decided it was time to migrate from their homebrew CMS to a modern content solution.
Hygraph provided the modernized tech stack they wanted and allowed AutoWeb to change the schemas and the level of customization offered, a key consideration following a migration. Autoweb migrated to a Jamstack infrastructure and Hygraph at once. They monitored the system performance for some time to make sure everything was working and it turned out to exceed expectations. The new tech stack helped significantly boosting their organic reach and increase monetization opportunities on the website.
The choice of whether to go for a big bang or take a phased approach instead will come down to the size of your business and existing content assets. Each approach offers advantages and disadvantages over the other.
For some organizations, a big bang approach might be the easiest way to start leveraging the capabilities of a new headless CMS. For others, several sub-systems and integrations might make a big bang migration a complex undertaking.
Migrating from any platform to another isn’t a straightforward process; the same goes for a headless CMS. Get started on your migration by reading our eBook: The True Cost of CMS Migration.
Download eBook: The True Cost of CMS Migration
The A-Z guide to switching web content management platforms.
We will examine the concept of big bang CMS migration and how it compares to other migration options.
Last updated by Jing
on Jan 21, 2026
Originally written by Jing
A CMS migration involves moving all content and data assets from one content management system to another. Companies typically decide they need to perform a migration if their existing CMS isn’t quite up to scratch for their current business requirements, or it could be time for a replatforming.
When it’s time to migrate, many companies opt for a big bang migration. But what is it, and are there other options available?
In a big bang migration, all content and data assets are migrated from the old CMS to the new CMS in one instance. Since a big bang migration happens all at once, a lengthy planning period is usually involved. For those that frequently use the CMS, like content authors and developers working on the website, there will be a cut-off time when no new content projects are being created or updated.
A typical big bang migration begins in the planning stages, where the scope, scale, and time for conducting the migration are outlined. Next, the new CMS chosen for the migration is implemented to ensure that content and data have a predetermined destination. Next comes the big bang, where migration occurs. Finally, testing and reviewing the new system are conducted to ensure everything was migrated correctly.
While a big bang CMS migration is a popular approach, other options are available.
The trickle migration, or the phased approach, progressive migration, or strangler pattern, focuses on moving content and data assets to a new CMS piece by piece. Think of a trickle migration as a bunch of smaller migration projects rather than a single large migration project like what occurs with a big bang.
The choice of which parts of the system should be included in each phase will be outlined in the planning stages. Companies planning a phased migration will likely have a much longer planning and preparation phase than those undergoing a big bang migration.
When opting for a trickle migration, a business might start by setting up the new CMS infrastructure. After that, they can begin the phases. Phase 1 could be migrating existing themes or building a new website from scratch. Next, migrating content and data assets, followed by custom features or extensions that were originally part of the old system and necessary for the new system to function.
When choosing either a big bang or a trickle migration, you need to consider both their advantages and disadvantages:
Advantages of big bang migration
Less costly: Instead of maintaining your existing CMS and a new CMS simultaneously, you can perform the migration when the previous system is almost ready to be retired. This, combined with the shorter migration time, can make it less costly.
Less complexity: Moving from one system to another in one instance reduces complexity as your team doesn’t have to worry about managing multiple systems simultaneously.
Shorter wait time: Whereas other approaches might see the migration process spread out over a few months, a big bang migration can be concluded within a few hours, provided all of the prep work has been completed correctly.
Disadvantages of big bang migration
Rollback risk: Since a big bang migration is meant to occur in one fell swoop, it becomes harder to walk it back if anything goes wrong. Engineering teams will need to start from scratch if the migration fails, assess what went wrong, and try again.
Downtime required: Performing a big bang migration requires downtime for content authors and developers working with the CMS and a pause on all new projects. If everything goes well, the downtime could be handled on the weekend, but if any issues occur, that could stretch into days or weeks, resulting in lost revenue for the business.
Advantages of trickle migration
No downtime: Using a phased migration approach enables companies to avoid downtime when moving content assets from one CMS to another. Everything can be moved, tested, and quality checked before shutting down the older system for good.
Continuous learning: A CMS migration is straightforward but isn’t always easy. Since a trickle migration is done in multiple phases, engineers performing the migration can learn from any mistakes that occur. If something goes wrong in phase two, they can note it and fix the problem before it affects any other phases.
Less risky: The phased approach of a trickle migration is inherently less risky than if a company decides to perform a big bang migration. Breaking up the project into phases enables migration teams to deal with any issues before they become bigger. It also allows them to continue operating normally without any interruptions that could slow down time to market for new content campaigns or completely halt them.
Disadvantages of trickle migration
Longer time to completion: A big bang migration could occur in a few hours or days, but a trickle migration will likely take weeks or months. For companies that want to take advantage of the features of their new system, such as a headless CMS, the long wait for the migration to be complete could be problematic.
Complex: A trickle migration is a complex undertaking. With so many moving parts, new assets being created while the migration is already underway, and other potential challenges that might crop up during the process, a trickle migration might be a problem for some companies, even though it might be the only solution for others.
Expensive: When companies choose to perform a trickle migration, they need to be running two systems at the same time. Paying for multiple licenses, straining resources between two CMSs, integrating multiple systems, and coordinating a lengthy project can lead to a much higher cost when performing a phased migration. The likelihood of delays is also much higher, which can be quite costly for companies.
Big bang migration
Trickle migration
Length of time to complete
Shorter: A few hours or days
Longer: Weeks or months
Complexity
Simpler due to one migration
Plan out a few migration phases is needed
Cost
Less time required to maintain 2 systems
More expensive due to length of time and maintenance of multiple CMSs
Downtime
Required
Not required or negligible
Failsafes
Need to rollback to data backup
Continuous learning and easier to manage errors in smaller migration projects
#Best practices for a successful big bang CMS migration
Opting for a big bang rather than a phased approach might be best for some organizations. But to avoid the potential issues that might crop up, you should consider these best practices:
Define the project scope
Outline the project scope and create a timeline and migration plan from pre-migration to final testing. Having the project scope to refer to ensures that you don’t get distracted and can avoid scope creep, adding additional time to the migration process.
Perform content mapping
When moving to a new CMS, all content assets and metadata must be moved to the new CMS; otherwise, companies could suffer from SEO and findability issues. To avoid this, it’s necessary to create an inventory of all existing content and assets in the current CMS. Also, defining the content types and fields in the new CMS and mapping them to the corresponding content in the old CMS so that data transfer issues are avoided.
Implement a new CMS system
Next, it’s time to implement the new CMS as well as any accompanying extensions and third-party services. For instance, it might be time to move a modern headless CMS.
Implement a content freeze on the old system
After implementing the new CMS, it will be time to start the final stages and prepare for migration. That starts by implementing a content freeze when any new assets can’t be created, and there’s an overall halt on any changes or updates to content in the current CMS. This ensures that there will be a smoother transition to the new CMS.
Content teams will need to pause any campaigns in progress, but provided the planning stage was done correctly; there should be no projects scheduled to be worked on once the migration has reached this period.
Back up data
After the content freeze has been implemented, teams should have a complete idea of all the content in their system and can safely back up all of the data at this point. The backup step is crucial as if anything goes wrong during the migration, the engineering team will need to access all of the data to try again.
Perform the big bang
Finally, it would be time to perform the big bang CMS migration and move all of the data and content assets to the new CMS.
Do testing on the new system
Providing the migration went smoothly, and there were no issues, it would be time to test the new CMS to ensure everything functions correctly. Also, content teams should be consulted at this stage to help inventory all content assets to ensure that everything was recovered during the migration process.
AutoWeb, one of the first internet companies in the automotive industry, wanted to upgrade its tech stack to gain better velocity and flexibility. Since they could not release digital content and provide a navigation experience that enhanced the customer journey in the way they wanted, they decided it was time to migrate from their homebrew CMS to a modern content solution.
Hygraph provided the modernized tech stack they wanted and allowed AutoWeb to change the schemas and the level of customization offered, a key consideration following a migration. Autoweb migrated to a Jamstack infrastructure and Hygraph at once. They monitored the system performance for some time to make sure everything was working and it turned out to exceed expectations. The new tech stack helped significantly boosting their organic reach and increase monetization opportunities on the website.
The choice of whether to go for a big bang or take a phased approach instead will come down to the size of your business and existing content assets. Each approach offers advantages and disadvantages over the other.
For some organizations, a big bang approach might be the easiest way to start leveraging the capabilities of a new headless CMS. For others, several sub-systems and integrations might make a big bang migration a complex undertaking.
Migrating from any platform to another isn’t a straightforward process; the same goes for a headless CMS. Get started on your migration by reading our eBook: The True Cost of CMS Migration.
Download eBook: The True Cost of CMS Migration
The A-Z guide to switching web content management platforms.