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MongoDB and Cognition Launch Devin for MongoDB Modernizations to Automate Legacy Migrations

September 29, 2026 at 14:41 EDT

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MongoDB and Cognition launched Devin for MongoDB Modernizations on Sept. 29, 2026, connecting Cognition's AI software engineer with MongoDB's Application Modernization Platform to automate more of the move from legacy applications to MongoDB Atlas. The companies say the offering is available now to MongoDB and Cognition customers and is meant to reduce migration timelines from years to months.

Sept. 29, 2026 | MongoDB + Cognition

Legacy migrations get an agent layer

Devin now plugs into MongoDB AMP so code rewrites, data movement, and validation can move through one coordinated path to Atlas.

AMP phases: understand, transform, migrate, verify

10x+

Reported AMP code-transformation acceleration

2-3x

Reported overall modernization project speedup

Early joint test: hours compressed

A work unit that had taken five to six hours took just over one hour after the Devin and AMP integration.

5-6h

Before

1+h

After

Takeaway: the integration targets the slow, repetitive code-and-data handoffs inside legacy migrations.

How the workflow is split

1. UnderstandMap legacy behavior and sequence the migration.

→

2. RewriteDevin updates business logic and data access code.

→

3. Move dataAMP moves and validates records into MongoDB.

→

4. VerifyTeams confirm the modernized app matches the original.

Named customer proof point

Bilt used Devin to rebuild search and personalization on MongoDB, with a final push averaging dozens of merged pull requests per day.

What still stays human

Engineers still own target data model choices and cutover sequencing; pricing and a detailed public benchmark were not disclosed.

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