Fireflies.ai vs Sierra: 2026 comparison
Conversation-intelligence agent for sales and CS — transcribes, scores, and syncs calls to your CRM.
Fireflies.ai vs Sierra — specs
| Spec | Fireflies.ai | Sierra |
|---|---|---|
| Agent Rank | 73 / 100 (A) | 78 / 100 (A) |
| Autonomy | Assistant | Autonomous |
| Pricing | Freemium · from $10 | Subscription · Free tier |
| Open source | No | No |
| Capabilities | Voice, RAG, Memory, Tool use | Voice, Tool use, Memory, RAG |
| Integrations | 5 apps | 3 apps |
| Verified | Verified | Verified |
| Released | Jan 2025 | Feb 2025 |
Agent Rank breakdown
- Autonomy fit
- 7
- Capabilities
- 8
- Integrations
- 4
- Pricing value
- 8
- Polish & maturity
- 7
- 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
- +Strongest conversation-intelligence and CRM integration in the category
- +60+ languages of transcription, leading the category for global teams
- +Generous free tier (800 min/mo) — easy to evaluate before buying
- −Less polished personal note-taking UX than Otter
- −Sentiment analysis still occasionally misclassifies sarcasm or context
- −Privacy controls require careful configuration per meeting
- +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
- +800 min/mo
- +AI summaries
- +8000 min/mo
- +60+ languages
- +CRM sync
- +Conversation intelligence
- +Topic tracking
- +Advanced analytics
- +Unlimited transcription
- +SSO
- +Dedicated CS
- +Voice + chat
- +Custom persona
- +White-glove implementation
- +SOC 2 II + HIPAA option
Which one should you pick?
Pick Fireflies.ai if its specific capabilities (Voice, RAG) match what you need.
Try Fireflies.ai →Pick Sierra if cost is the main constraint or if you want the highest autonomy and the verification loop is in place.
Try Sierra →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Fireflies.ai or Sierra in 2026?+
Pick Fireflies.ai if its specific capabilities (Voice, RAG) match what you need. Pick Sierra if cost is the main constraint or if you want the highest autonomy and the verification loop is in place. Most working teams running both can use Fireflies.ai for primary work and Sierra for the workflows where its specific strengths matter.
What's the price difference between Fireflies.ai and Sierra?+
Fireflies.ai starts at Freemium · from $10; 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, Fireflies.ai or Sierra?+
Sierra is the more autonomous of the two (Autonomous vs Assistant). Higher autonomy ships throughput faster but requires verification loops in place — see our autonomous-vs-copilot framing for when each tier wins.