Skip to content
effecthub

Cosine vs Devin

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Cheaper paid plan
Cosine — $19/mo vs $20/mo for Devin
Free plan
Only Devin (Cosine has paid plans only)
Public API
Devin has one; not confirmed by us for Cosine
Higher Trust score
Cosine — 93 vs 84 for Devin
Best fit
Cosine: Banks, defence and healthcare engineering teams that need an on-premises or air-gapped coding agent · Devin: Engineering teams delegating well-specified tickets such as migrations, test coverage and dependency upgrades

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Side by side

FactCosineDevin
CategoryAI Coding AssistantsAI Code Editors & IDEs
Pricing modelPaidFreemium
Starts at$19/mo$20/mo
Public APINot confirmedYes
Trust score93 / 10084 / 100
PlatformsWeb, macOS, LinuxWeb, macOS, Slack app, API
CompanyBuildt AI Limited (Cosine)Cognition AI, Inc.
Launched2022—
Last verifiedOct 2, 2026Sep 6, 2026

What our research says

Cosine

Cosine is aimed at organisations that cannot send code to a public cloud and want a coding agent plus a model trained for their stack, which few competitors offer. Individual developers can start on a $19 plan, but the product's differentiation is in sovereign and air-gapped setups. If you only want an inline editor assistant, other tools are simpler.

Pros

  • Runs from a CLI, a cloud workspace and a desktop app under one account and credit pool
  • Own Lumen models, with cheaper Scout and heavier Outpost tiers
  • Single-tenant and fully air-gapped deployment options
  • Self-serve plans start at $19 a month with published credit allowances

Cons

  • Credit consumption varies by model, which makes monthly cost hard to predict
  • Smaller ecosystem and community than the large coding assistants
  • Enterprise and private-deployment pricing is not public

Devin

Devin is the agent to hand a whole ticket to and walk away from, and the $20 Pro tier makes that affordable to try for the first time. The quota is the catch: a long autonomous session can exhaust a plan quickly, and once it does you are paying API rates, so it suits teams that batch well-scoped tasks rather than developers who want a tireless pair programmer in the loop.

Pros

  • End-to-end autonomy: plans, codes, tests and opens the pull request from its own cloud machine
  • Fans one large task out across parallel agents and manages them itself
  • Native Slack, Linear, Jira and GitHub integration plus Desktop and CLI clients
  • Entry price dropped to $20 a month, far below the original enterprise-only positioning

Cons

  • Quotas are described only qualitatively ('light', 'generous'), so cost per task is hard to predict
  • Overage is billed at API pricing, which is where a runaway agent session gets expensive
  • Team tier adds a flat $80 a month on top of $40 per full user
  • Pages are heavily client-rendered; the terms live on cognition.com, not devin.ai

Which one fits

Choose Cosine if you need

  • Banks, defence and healthcare engineering teams that need an on-premises or air-gapped coding agent
  • Teams maintaining legacy or niche-language code such as COBOL, Fortran or Verilog
  • Developers who want a terminal-first agent with parallel cloud tasks

Choose Devin if you need

  • Engineering teams delegating well-specified tickets such as migrations, test coverage and dependency upgrades
  • Organisations that want agents assigned from Slack, Linear or Jira and reviewed as pull requests
  • Large codebases where a task can be fanned out across parallel cloud agents

Cosine vs Devin: the questions people ask

Is Cosine cheaper than Devin?

On published entry prices, Cosine starts lower — $19/mo against $20/mo for Devin. Entry price is the lowest paid plan as we last verified it; what each plan includes differs.

Does Cosine or Devin have a free tier?

Devin has a free tier; Cosine has paid plans only.

Which has a public API, Cosine or Devin?

Devin ships a public API, as of our last verification. A public API for Cosine is not confirmed by us — check its developer docs before you plan an integration.

All Cosine alternatives →All Devin alternatives →Browse all AI Coding Assistants →