Magic.dev vs Sierra: 2026 comparison
Autonomous AI engineer trained on long contexts — handles hour-long coding sessions without losing track.
Magic.dev vs Sierra — specs
| Spec | Magic.dev | Sierra |
|---|---|---|
| Agent Rank | 67 / 100 (B) | 78 / 100 (A) |
| Autonomy | Autonomous | Autonomous |
| Pricing | Subscription · Free tier | Subscription · Free tier |
| Open source | No | No |
| Capabilities | Code, Tool use, Memory | Voice, Tool use, Memory, RAG |
| Integrations | 2 apps | 3 apps |
| Verified | Verified | Verified |
| Released | May 2025 | Feb 2025 |
Agent Rank breakdown
- Autonomy fit
- 9
- Capabilities
- 6
- Integrations
- 2
- Pricing value
- 9
- Polish & maturity
- 4
- 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
- +Unique long-context model — can hold an entire mid-sized repo in one session
- +Strong on cross-cutting refactors that other agents struggle with
- +Funded at frontier-lab levels — engineering muscle behind the product
- −Enterprise pricing — no public per-seat tier
- −Newer entrant — fewer customer references than Devin or Cursor
- −Best for very large codebases; overkill for solo + small-team work
- +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
- +Long-context model (100M+ tokens)
- +Codebase-wide reasoning
- +Custom deployment
- +Voice + chat
- +Custom persona
- +White-glove implementation
- +SOC 2 II + HIPAA option
Which one should you pick?
Pick Magic.dev if its specific capabilities (Code, Tool use) match what you need.
Try Magic.dev →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Magic.dev or Sierra in 2026?+
Pick Magic.dev if its specific capabilities (Code, Tool use) match what you need. Pick Sierra if its specific capabilities (Voice, Tool use) match what you need. Most working teams running both can use Magic.dev for primary work and Sierra for the workflows where its specific strengths matter.
What's the price difference between Magic.dev and Sierra?+
Both Magic.dev and Sierra start in the same pricing range (Subscription · Free tier vs Subscription · Free tier). Total cost of ownership depends on your team size and volume — see the TCO calculator for your specific math.
Which is more autonomous, Magic.dev or Sierra?+
Both Magic.dev and Sierra are Autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.