Coding agent alternatives, compared

Sinatra is an autonomous coding agent you hand a GitHub or Linear issue like a teammate. Add the Sinatra label on GitHub or assign the ticket in Linear, and it opens a branch, writes the code, runs your tests, and ships a pull request you review. You can also start a task from your terminal with the sinatra CLI, or from Claude Code or Cursor over MCP; it still runs on Sinatra's hosted agent. It runs on your own model key or on the Claude or Codex subscription you already pay for. Sinatra never bills for model usage; its plans are one flat monthly price for the whole workspace, from $20 on Pro, however many people are in it. Below is how that compares to the agents teams shortlist against it, including the rows where Sinatra falls short.

For an outside view: agentic.ai scores every coding agent in its directory on a 36-point agenticness rubric and ranks Sinatra #4 of 23 (21/36, September 2026), tied with Cursor and ahead of Copilot, Factory, OpenHands, Devin and Jules. The comparisons below are ours; that one is not.

1. Yes means the vendor's own app starts a run from the issue itself, with nothing to commit to the repo first. Sinatra's trigger is the Sinatra label that ships with the GitHub App install (`sinatraai` on the hosted app). Partial means either that a workflow file and an API-key secret have to be added per repository first, or that the mention only works on pull requests and not on issues.
2. Yes means assigning the ticket to the agent in Linear starts the run. Partial means the run starts some other way: an attachment link you click, or a trigger you configure yourself against Linear's webhooks. Assignment on its own does nothing.
3. Yes means a documented HTTP API or MCP server starts a run on the vendor's hosted agent from a task the caller writes, so a script, a CI job, or an MCP client can hand off work and follow it to a pull request. Partial means only the vendor's CLI can start such a run, or the API only fires an automation saved ahead of time, or it is enabled for selected organizations only. Local agent sessions, and MCP servers that only read docs or tickets, don't count. Creating, labeling, or assigning an issue through a tracker's API, so that a tracker trigger or a saved automation picks it up, doesn't count either. Sinatra's MCP server takes an OAuth sign-in from Claude Code, Cursor or claude.ai, or a personal access token; the HTTP API and the `sinatra` CLI take the token; and every run happens on Sinatra's hosted agent.
4. Yes means a changes-requested review is enough on its own: Sinatra reworks the branch and pushes the follow-up commit with no re-trigger and no mention. Partial means the agent acts only when it is @-mentioned in the thread, or only while its original session is still open.
5. Yes means your own provider API key runs the agent everywhere the product runs it. Partial means keys work on some surfaces but not the one being compared here, either because the vendor documents them as local-CLI-and-desktop only, or because it never documents them covering its cloud agent at all.
6. Yes means a Claude Pro/Max or ChatGPT subscription you already pay for authenticates the run on the vendor's hosted cloud. Partial means it works only where that CLI's login already sits on the machine: your own laptop or a self-hosted backend, not a clean cloud sandbox.
7. Yes means the vendor never charges you for model use itself: it runs on a key or subscription you pay a model provider for, or model use is included in a flat plan and capped by a rate limit or task quota rather than charged. When the vendor is itself the model provider, paying its own API rates on your own key counts as paying your provider. Partial means the vendor bills model use unless you bring your own key on the surface compared here. No means the vendor bills model use, as tokens, credits, or units, at cost or marked up, including usage past an included allowance. Sinatra runs on your own Claude or ChatGPT subscription or API key and never bills for model usage.
8. Both halves have to be published: the plan price, and the rate for work past the plan. A published seat price sitting on top of an undisclosed credit, compute unit, or quota size is partial.
9. Yes means the free tier states its limits as numbers. Sinatra's Free plan is 1 task at a time, plus 1 queued with no daily limit and no card, on your own subscription or API key; each request runs for up to 60 minutes, and if it needs longer Sinatra stops, keeps the changes, and picks up when you reply. Partial means a free plan exists but its limits are not published, or are published in a unit whose size isn't.
10. Yes means the vendor supplies model access and bills for or includes that usage. Sinatra requires your own workspace API key or personal subscription on every tier, including existing and paid accounts, and does not bill model tokens.
11. Yes means an editor plugin or a desktop app; partial means a terminal CLI and no plugin or app of the vendor's own inside an editor. Sinatra is partial: the `sinatra` CLI, and an MCP server that Claude Code, Cursor, claude.ai and other MCP clients can call, hand work to the hosted agent, which works in its own sandbox and comes back as a pull request. There is no editor extension, and the agent never runs on your machine. If you want an assistant working inside your editor, that is a real reason to pick one of these instead, and several teams run both.
12. Sinatra has no Slack trigger available to all customers. Slack is a restricted preview; GitHub, Linear, and the CLI, MCP server and HTTP API are the generally available ways to start work.
13. Yes means you can run the agent on infrastructure you control, or the source is open. Partial means execution or inference can be pointed at your own account while the product itself stays the vendor's and stays closed. Sinatra is hosted only; there is no self-managed build.

Competitor facts were read off each vendor's own documentation and pricing pages between September 3, 2026 and September 7, 2026. The “Start a hosted run over API or MCP” row was read on October 13, 2026. Sinatra's terms reflect the current own-credential requirement.

One page per alternative

Each page covers how you start a task, what it costs in dollars, where Sinatra wins, where the other tool wins, and how to run both while you decide.

Competitor marks were read off each vendor's own documentation and pricing pages between September 3, 2026 and September 7, 2026, never from a third-party roundup, and each page lists the exact URLs. The “Start a hosted run over API or MCP” row was read on October 13, 2026. Sinatra's terms reflect the current own-credential requirement. If we have something wrong, tell us and we will change it.