# Devin

Autonomous AI software engineer that plans, writes, tests, and ships code with human review

## About Devin

Devin, from Cognition, is an autonomous software engineer. Given a ticket or a bug, it plans the work in its own environment with a shell, an editor and a browser, writes and tests the change, and opens a pull request for a human to review. Cognition also owns Windsurf, the IDE, and sells Devin Enterprise. Sistava is a different category entirely: a workforce for sales, marketing, support and operations, hired by people who mostly do not have an engineering team.

## Platform details

- Pricing: Subscription with metered consumption. Work is measured in agent compute units rather than seats, with individual and team plans and a quoted enterprise tier, so the bill tracks how much agent runtime you use.
- Founded: 2023, San Francisco (Cognition)
- Funding: $1B+ raised at a $25B valuation (2026). Investors include Founders Fund, Khosla Ventures, and Lux Capital.
- Last reviewed: 2026-08-17

## Official website

- [Visit Devin](https://cognition.com)

## What is Devin?

Devin is an AI software engineer that works asynchronously. You hand it a ticket the way you would hand it to a colleague, and it works in its own environment with a terminal, a code editor and a browser, running tests and iterating until the change is ready for review. You reach it where engineers already are. There is a web app, tagging it in a Slack or Teams thread, a CLI that can hand a hard task off to the cloud version, and an API. Cognition positions it for work a person could finish in a few hours, and for running several such tasks at once. Cognition also owns Windsurf, the AI IDE, and sells Devin Enterprise for larger organizations. The company raised at a valuation that puts it among the most heavily funded AI companies, which matters mainly because it signals this product is not going away.

## Why this comparison exists at all

People compare Devin and Sistava because both are described as autonomous AI workers. That is where the similarity ends. Devin is measured on pull requests merged; a Sistava employee is measured on whether the outreach went out and the customer got an answer. The buyer is different too. Devin is sold to engineering organizations with a backlog and reviewers to check the output. Sistava is bought by founders and small teams who often have no engineers at all. If you genuinely need both, they coexist without conflict. Nothing about hiring an AI marketer affects how your engineering team ships, and we would not suggest one as a substitute for the other.

## Cost shape and predictability

Devin meters agent compute, so an ambitious refactor costs more than a one-line fix. That is a rational way to price engineering work, and it lets a team start small, but it does mean forecasting takes attention. Sistava is flat per workspace. An employee that works hard all month costs what a quiet one costs, which is the right shape when the buyer is a small business watching cash rather than an engineering org with a tooling budget. Neither model is universally better. Metered pricing rewards occasional heavy use; flat pricing rewards continuous use. Pick the one that matches how the work actually arrives.

## Comparison

- [Compare Devin with Sistava](/en/compare/dev-frameworks/devin) — See the two platforms side by side when you are ready to evaluate them.