Devin vs Sierra: 2026 comparison
Autonomous AI software engineer that ships PRs end-to-end.
Devin vs Sierra — specs
| Spec | Devin | Sierra |
|---|---|---|
| Agent Rank | 78 / 100 (A) | 78 / 100 (A) |
| Autonomy | Autonomous | Autonomous |
| Pricing | Subscription · from $500 | Subscription · Free tier |
| Open source | No | No |
| Capabilities | Code, Tool use, Browser, Memory | Voice, Tool use, Memory, RAG |
| Integrations | 3 apps | 3 apps |
| Verified | Verified | Verified |
| Released | May 2025 | Feb 2025 |
Agent Rank breakdown
- Autonomy fit
- 9
- Capabilities
- 8
- Integrations
- 6
- Pricing value
- 4
- Polish & maturity
- 10
- Verifiability
- 10
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
- Autonomy fit
- 9
- Capabilities
- 8
- Integrations
- 6
- Pricing value
- 9
- Polish & maturity
- 5
- Verifiability
- 10
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Pros & cons
- +Highest autonomy in the coding category — ships PRs end-to-end with minimal oversight
- +Iterates on failing tests until they pass; explains what it did in the PR description
- +Multi-agent UI for managing parallel sessions
- −Pricing puts it firmly in team territory — overkill for solo founders
- −Will ship working code that's wrong for your codebase if architectural context is missing
- −Session memory weak past hour-long stretches
- +Best-in-class for branded customer-facing agents (voice + chat parity)
- +Concierge onboarding from one of the strongest teams in AI
- +Indistinguishable-from-human quality in tier-1 deployments
- −Enterprise-only pricing — typical contracts $150–500k/year
- −Deployment is white-glove, not SaaS — multi-week setup
- −Overkill for SMB or mid-market support volumes
Pricing
- +Unlimited sessions
- +Slack + GitHub + Linear integrations
- +10 concurrent sessions
- +Email support
- +Everything in Core
- +Priority queue
- +40 concurrent sessions
- +SSO
- +Shared knowledge base
- +Custom concurrency
- +Dedicated VPC option
- +SOC 2 II reports
- +Onboarding engineer
- +Voice + chat
- +Custom persona
- +White-glove implementation
- +SOC 2 II + HIPAA option
Which one should you pick?
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Frequently asked
Should I pick Devin or Sierra in 2026?+
Pick Devin if its specific capabilities (Code, Tool use) match what you need. Pick Sierra if cost is the main constraint. Most working teams running both can use Devin for primary work and Sierra for the workflows where its specific strengths matter.
What's the price difference between Devin and Sierra?+
Devin starts at Subscription · from $500; Sierra starts at Subscription · Free tier. Sierra is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.
Which is more autonomous, Devin or Sierra?+
Both Devin and Sierra are Autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.