One agent, two places to work with it
Cognition sells one idea, delegated engineering, in two working modes. Devin is the cloud agent: it runs in its own environment, takes a task from a chat, a ticket or an event, and returns a pull request for a person to review. Devin Desktop is the editor on a developer's own machine, where local agents work next to the person; it is the product line that came with Windsurf, whose brand Cognition says it has merged with its own. Cognition's own model, SWE-1.6, had become the most used model in Devin Desktop by May 2026, which the company credits to its cost and its speed of up to 950 tokens a second.
Around the agent sit tools that help people and agents understand a codebase. Devin Search answers questions about code and cites the files it used, and DeepWiki writes architecture documentation for a repository with an Ask Devin box for follow-up questions. In April 2026 Cognition began charging for Ask Devin, DeepWiki and Devin Review, which had been free. Its September 2026 funding post added narrower agents: Auto-Triage takes a first pass at incident investigation, Security Swarm finds and triages vulnerabilities, and Automations start work from events in other systems.
Where the code runs, and whose model writes it
Enterprise buyers first ask where their code goes. Cognition's documentation splits Devin in two. The brain, a stateless service that powers Devin's intelligence, always runs in Cognition's cloud. The Devbox, where code executes and connects to the customer's systems, can run in a single-tenant environment that Cognition hosts for one customer and links to the customer's network through AWS PrivateLink or an IPSec tunnel, and an Enterprise Assured tier adds customer managed encryption keys. Under a multi-year agreement with AWS announced in September 2026, customers can buy Devin on AWS Marketplace and choose the AWS region where their dedicated Devin runs, which the company says helps teams meet local data residency requirements.
The second question is the model. Cognition calls itself an agent lab: it works with all the foundation model labs and combines their models with its own. Wu said in 2025 that the company does fine-tuning and reinforcement learning on models but does not pre-train base models. In July 2026 it wrote that SWE-1.7 started from an open-source model and that many of the strongest open-source models come from AI labs in mainland China. It tested SWE-1.7 on its own trustworthiness suite, which includes 145 politically sensitive questions, and reported results as good as or better than models from US frontier labs.
Who has bought it, and what was measured
Nubank gives the clearest before and after. Moving about 100,000 data class implementations out of a monolith had been planned as 18 months of work for more than 1,000 engineers. Nubank collected migrations its engineers had done by hand, used some to fine-tune Devin and the rest as a test set, then delegated the work. The case study reports 8 to 12x efficiency, defined as the hours a migration task normally takes against the hours spent prompting and reviewing Devin, and over 20x cost savings on the delegated scope.
Itaú shows adoption spreading inside a bank. Brazil's largest bank, with more than 17,000 people in technology, first tried a standard A/B test of teams with and without Devin, an approach the case study says assumed Devin was a tool for discrete tasks. Within five months a waitlist of nearly 1,000 developers formed. Nine months later the bank opened Devin to everyone working with technology, and 75% of its teams use it, by the case study's count, which also reports about 70% of scanner-flagged vulnerabilities resolved automatically.
We’re going to start augmenting our workforce with Devin, which is going to be like our new employee.
Marco Argenti · Chief Information Officer, Goldman Sachs · Television interview, as reported in the press · 2025-07-11
Two more cases show the range of buyers. Mercedes-Benz ran a four-week pilot in which, by Cognition's account, Devin analysed more than 200,000 lines of COBOL and cut an estimated eight months of modernisation work to eight days; the carmaker then deployed Devin, Windsurf and Devin for Terminal across engineering teams from the United States to Europe and Asia. WPP Enterprise Solutions, a services unit with more than 12,000 experts, uses Devin on client projects, and Cognition engineers work hands-on with its engineers to scope each new use case. On one e-commerce rebuild its case study reports 110% of the contracted scope delivered in 25% less time.
Every result above is measured by the customer or by Cognition and published by Cognition. Each describes one task or one project, rather than a company's overall productivity. In an interview, keep a claim and its definition together: eight days against an estimate of eight months compares a forecast with an outcome.
The Deployed Engineer posting describes this exact work: product demos, pilots, picking the right use cases and training customers to roll Devin out to thousands of engineers. The Nubank and Itaú cases are the fastest way to learn the playbook before a first conversation.