Fireflies.ai vs Sierra Comparison

Why choose Fireflies.ai

• Has a free plan (Sierra does not)
• Higher Cost score (8/10 vs 2/10)
• Higher Ease of Use score (8/10 vs 7/10)
• Better fit for small business (8/10 vs 1/10)
• Better fit for freelancers (6/10 vs 1/10)

Why choose Sierra

• Higher Support score (8/10 vs 4/10)
• Higher Customization score (9/10 vs 6/10)
• Better fit for customer support teams (10/10 vs 4/10)
• Better fit for enterprise (10/10 vs 7/10)

Fireflies.ai

Pros

• Free plan includes unlimited transcription and AI summaries across Zoom, Meet and Teams.
• Pro is around 10 USD per seat on annual billing, which is cheap for the category.
• AskFred lets users query their whole meeting history in chat.
• Enterprise tier covers SSO, SCIM, audit logs, HIPAA and private storage.
• Pushes notes into Salesforce, HubSpot and Slack.

Cons

• Accuracy drops with noise, accents and crosstalk, and speakers are sometimes misidentified.
• Users on Trustpilot report billing surprises and a hard-to-use cancellation flow.
• Support is mostly chatbot-based outside Enterprise.
• The visible notetaker bot can join meetings unexpectedly and bother external participants.
• AI credits are limited, and extra credit bundles renew automatically.

Sierra

Pros

• Outcome-based billing means customers usually pay only for resolved conversations or other agreed results, not for each seat.
• Three build options cover both CX teams and engineers: the no-code Agent Studio, the code-first Agent SDK, and Ghostwriter for building agents from SOPs.
• One agent runs across chat, voice, SMS, WhatsApp, email and ChatGPT, keeping context between channels.
• Its list of compliance attestations is broad, covering SOC 2, ISO 27001, ISO 42001, HIPAA, PCI DSS and FedRAMP.
• It has a strong roster of enterprise customers, including SiriusXM, ADT, Rocket Mortgage and SoFi.

Cons

• There is no public pricing, and competitor estimates put annual contracts at about $150,000 or more.
• There is no self-serve or trial tier, so small teams cannot try it on their own.
• Implementation is largely vendor-led, which can make customers depend on Sierra's team for changes.
• There are few public reviews (7 on Gartner Peer Insights) to verify claims against.
• Some reviewers say voice quality still falls short of human level, and that complex telephony setups depend on how far the integration goes.