Cosine vs Jules
Cosine and Jules are both async coding agents that read your GitHub repo, resolve a task, and open a pull request — but they are built for different workflows. Cosine integrates with Jira, Linear, and GitHub Issues to pick up tickets from your project management tool and has stronger benchmark results. Jules is Google's entry with a more generous free tier (15 tasks/day vs Cosine's 80-task one-time free tier) and a unique plan-first approach where you approve the implementation plan before a line of code is written. Cosine suits teams with established issue trackers; Jules suits individual developers who want free autonomous tasks.
Cosine
Choose if: You have an active Jira or Linear board and want an agent that picks up and closes tickets autonomously, with stronger benchmark performance.
Autonomous AI software engineer for your issue tracker
Jules
Choose if: You want the most generous free async agent (15 tasks/day, no credit card) and prefer to review and approve the implementation plan before code is written.
Google's async AI coding agent for GitHub
Feature Comparison
| Feature | Cosine | Jules |
|---|---|---|
| Free tier | 80 tasks (one-time) | 15 tasks/day, 3 concurrent✓ |
| Starting price (paid) | $20/mo (Hobby) | $19.99/mo (via Google AI Pro) |
| Issue tracker integration | GitHub, Jira, Linear✓ | GitHub Issues only |
| Plan review before coding | No | Yes — approve or redirect✓ |
| Benchmark performance | 72% SWE-Lancer✓ | Not yet published |
| Model | Proprietary (trained on engineering reasoning) | Gemini 2.5 Pro |
| Backing | UK startup, £4.5M seed | |
| Async-only | Yes | Yes |
Pricing Comparison
Cosine
| Free | $0 |
| Hobby | $20/mo |
| Pro | $200/mo |
| Enterprise | Custom |
+ Credit-based — Hobby: 5M credits/mo, Pro: 60M credits/mo, UK Sovereign AI initiative participation — Lumen Sovereign variant available for UK institutions
Jules
| Free | $0 |
| AI Pro (via Google AI Pro) | $19.99/mo |
| AI Ultra (via Google AI Ultra) | $124.99/mo |
+ Bundled with Google AI Pro/Ultra subscriptions — not a standalone product, Google Workspace accounts not yet supported for paid tiers (personal Gmail only), Powered by Gemini 2.5 Pro for all tasks
Pricing last verified: 2026-06-23
Cosine: Strengths & Limitations
Strengths
- +Integrates directly with GitHub, Jira, and Linear — picks up and resolves tickets autonomously
- +72% on SWE-Lancer benchmark — strong real-world coding performance vs. Devin and Codex
- +Generous free tier — 80 tasks with no credit card required
- +Trains on data modeling how engineers reason — not just code completion patterns
Limitations
- -Async-only — no real-time IDE copilot mode
- -Newer and less proven in large enterprise codebases than Devin
- -Credit limits on Hobby tier can constrain teams with high ticket volume
- -No standalone IDE — requires existing GitHub/Jira/Linear workflow
Jules: Strengths & Limitations
Strengths
- +Very generous free tier — 15 tasks/day with no credit card required
- +Fully async — assign a task, get a PR delivered while you do other work
- +Shows its full plan before executing — you approve or redirect before code is written
- +Google-backed with Gemini 2.5 Pro and Search grounding for up-to-date context
Limitations
- -Google Workspace accounts not yet supported for paid tiers — personal Gmail only
- -Still in public beta — results can be unpredictable on complex multi-file tasks
- -Async-only — no real-time copilot or chat mode
- -Locked to Gemini models — no model choice
Which One Should You Pick?
Cosine is best for: Engineering teams who want to close tickets autonomously by assigning them to an AI agent.
Jules is best for: Developers who want a free async coding agent that shows its plan before writing a single line of code.
Last updated: 2026-06-23