Key Takeaways
- Fathom offers a genuinely unlimited free plan with instant AI summaries, making it the best starting point for solo users and small teams on a budget.
- Otter AI provides real-time collaborative transcription and works for both video calls and in-person meetings via its mobile app, a capability Fathom and Fireflies lack natively.
- Fireflies.ai leads on integrations, connecting with 50+ apps including Salesforce, HubSpot, Asana, and Trello, with automatic CRM logging after every call.
- Fathom’s paid Business plan starts at $25 per user per month (billed annually) and unlocks CRM field sync, deal view, and AI scorecards for sales teams.
- Otter AI’s Pro plan costs $8.33 per user per month (billed annually) while Fireflies Pro costs $10 per seat per month (billed annually), both offering AI summaries and action items.
- Fireflies supports transcription in 100+ languages, while Fathom covers 38 languages and Otter AI is primarily strong in English, Spanish, and French.
- All three tools integrate with Zoom, Google Meet, and Microsoft Teams, but Fathom’s native Zoom integration means no separate bot joins your call, which some users strongly prefer.
If you have sat through a one-hour meeting only to spend another thirty minutes writing up notes and action items, you already understand why AI meeting summary tools have become essential. The three biggest names in this space are Fathom, Otter AI, and Fireflies.ai. Each takes a noticeably different approach to solving the same problem, and the right choice depends heavily on how your team works, which platforms you rely on, and how much you are willing to spend.
Fathom built its reputation on a generous free tier and frictionless Zoom integration. Otter AI became popular among students and journalists for real-time transcription and mobile flexibility. Fireflies carved out a niche with sales teams and operations managers who need deep CRM automation and conversation analytics. In this comparison, we break down exactly how they differ so you can pick the one that fits your workflow.
This guide uses verified 2025 pricing data pulled directly from each tool’s pricing page and reflects the features available as of mid-2025. We cover transcription accuracy, summary quality, CRM integration, platform support, and pricing in detail, and finish with clear recommendations for different user types.
Quick Comparison
| Feature | Fathom | Otter AI | Fireflies.ai |
|---|---|---|---|
| Free Plan | Unlimited recordings and transcriptions | 300 minutes per month | 800 minutes per seat |
| Paid Plans (annual) | $16/mo (Premium), $15/mo (Team), $25/mo (Business) | $8.33/mo (Pro), $19.99/mo (Business) | $10/mo (Pro), $19/mo (Business), $39/mo (Enterprise) |
| Transcription Accuracy | ~92% | ~95% | ~90-93% |
| Language Support | 38 languages | English, Spanish, French | 100+ languages |
| In-Person Meetings | No | Yes (mobile app) | Limited |
| CRM Integration | Business plan only | Pro and above | Pro and above |
| Bot Visibility | Native Zoom, no bot required | Visible bot joins call | Visible bot joins call |
| Supported Platforms | Zoom, Google Meet, Teams | Zoom, Google Meet, Teams | Zoom, Google Meet, Teams, 50+ integrations |
| Best For | Solo users, free-tier seekers, Zoom-heavy teams | Students, journalists, hybrid/in-person teams | Sales teams, CRM-driven workflows |
What is Fathom?
Fathom is an AI meeting assistant built primarily around Zoom, though it also supports Google Meet and Microsoft Teams. It launched with a philosophy that great meeting notes should be free, and that philosophy is still reflected in its free plan today. Unlike most competitors, Fathom integrates natively with Zoom rather than sending a separate bot into your call, which means participants do not see an extra attendee in the participant list.
Fathom’s core strengths are speed and simplicity. The moment a call ends, Fathom delivers an AI-generated summary along with timestamped action items. Users can highlight key moments during a live call, and those highlights feed directly into the post-meeting summary. For sales professionals, Fathom’s Business plan adds CRM field sync, deal tracking, and AI-powered coaching scorecards.
The free plan includes unlimited recordings, unlimited transcriptions, and basic AI summaries, which is genuinely rare in this category. Paid plans unlock more advanced summary templates, custom vocabulary for transcription, team-wide search and playlists, and eventually full CRM automation. Fathom currently transcribes meetings in 38 languages and claims roughly 92% accuracy under normal conditions. It is the top pick for users who want a polished, low-friction experience without paying anything upfront.
One limitation worth noting is that Fathom is designed specifically for video conference calls. It does not have a standalone mobile app for recording in-person conversations, so if your work involves a mix of video calls and face-to-face meetings, you will hit that ceiling quickly.
What is Otter AI?
Otter AI has been around since 2016 and built its early audience among students, journalists, and researchers who needed a reliable way to transcribe interviews and lectures. That mobile-first heritage shows in the product today. Otter’s iOS and Android apps allow you to record and transcribe in-person meetings, workshops, and any conversation that does not happen on a video call, which is a real differentiator.
On video calls, Otter joins as a visible bot called “Otter.ai” in the participant list and provides real-time transcription that teammates can annotate collaboratively during the meeting itself. This live editing capability, where multiple attendees can highlight quotes, add comments, and correct errors in real time, makes Otter feel more like a shared workspace than a passive recorder.
Otter claims around 95% transcription accuracy, the highest of the three tools covered here, particularly in multi-speaker conversations. Its search functionality is strong, making it easy to retrieve specific moments across a library of past meetings. The free tier gives 300 transcription minutes per month, which is enough for light use but will run out quickly for daily meeting participants.
Otter AI’s main limitation is language support. It focuses primarily on English, Spanish, and French, making it a poor fit for international teams that operate across many languages. Its paid plans are also priced competitively at $8.33 per user per month (Pro, billed annually) with Salesforce and HubSpot integrations unlocking at that tier.
What is Fireflies.ai?
Fireflies.ai is the most feature-dense of the three tools, with a particular emphasis on sales and revenue operations use cases. It markets itself as a conversation intelligence platform rather than simply a note-taker, and that distinction matters. Where Fathom and Otter focus on accurate transcripts and clean summaries, Fireflies layers in analytics, sentiment tracking, talk-time ratios, topic tracking across multiple calls, and automated CRM logging.
Fireflies supports over 100 languages for transcription, the broadest coverage of the three, and connects to 50+ third-party apps. Beyond the standard Zoom, Google Meet, and Microsoft Teams integrations, Fireflies pushes action items directly into Asana, Monday.com, and Trello, and logs call notes, contacts, and deal updates into Salesforce, HubSpot, and Pipedrive with minimal manual input.
The free plan provides 800 minutes of storage per seat and unlimited transcription, which is more generous than Otter but still storage-capped unlike Fathom. The Pro plan at $10 per seat per month (billed annually) unlocks unlimited AI summaries, downloadable transcripts, and action item tracking. The Business plan at $19 per seat per month adds video recording, conversation intelligence, and team analytics dashboards.
One drawback that comes up in user reviews is that Fireflies can sometimes take 10 to 15 minutes to deliver transcripts after a call ends, which is slower than Fathom’s near-instant delivery. Teams with heavy accents or noisy environments may also find accuracy drops more noticeably with Fireflies than with Otter.
Feature-by-Feature Breakdown
Transcription Accuracy
Otter AI edges out the competition here with approximately 95% accuracy, particularly strong in multi-speaker calls and sessions with varied accents. Fathom sits at around 92%, which is more than adequate for most professional settings. Fireflies lands in the 90 to 93% range and can struggle with heavy accents or background noise more than the other two.
All three tools perform better in quiet environments with good audio quality and clear speaker separation. If your meetings involve multiple people talking over each other or non-native English speakers with strong accents, Otter AI is the safest pick. For most standard business calls, the differences will be subtle and unlikely to affect usability significantly.
Otter AI also has the advantage of real-time transcription that can be edited collaboratively during the meeting, which means errors can be caught and corrected before the summary is generated. This live correction capability is unique to Otter among the three tools.
Meeting Summaries and Action Items
Fathom delivers its AI summary almost immediately after a call ends, and the quality is consistently praised by users. The free plan includes basic summaries, while paid plans unlock 15+ expert templates covering sales calls, one-on-ones, customer discovery sessions, and more. Action items are automatically extracted and can be assigned to specific participants.
Fireflies generates solid summaries and automatically pulls action items, but its biggest differentiator is the ability to track topics and themes across multiple meetings over time. Sales managers can see which objections come up most frequently or how often competitors are mentioned across all team calls, not just individual meetings.
Otter AI’s summaries are clean and searchable, but the platform’s real strength is its collaborative annotation layer. During a meeting, attendees can flag specific moments for follow-up, and those flagged moments become part of the post-meeting summary automatically. The AI Chat feature (available on all plans with query limits) lets users ask questions about past meetings in natural language.
CRM Integration
Fireflies wins this category decisively. It offers native integrations with Salesforce, HubSpot, Pipedrive, and Zoho CRM, and automatically logs call recordings, transcripts, summaries, and action items directly into CRM contact and deal records. For sales teams that live in their CRM, this automation can save hours of manual data entry per week.
Otter AI connects with Salesforce and HubSpot starting at the Pro plan ($8.33/month annually), but the integration is less automated than Fireflies. You get more control over what gets logged, but also more manual steps.
Fathom’s CRM integration, including field sync and deal view, requires the Business plan at $25 per user per month (billed annually). That makes it notably more expensive for CRM-driven teams than Fireflies Pro at $10 per seat per month. However, Fathom’s CRM features are particularly well-designed for Salesforce users who want clean, structured data rather than raw transcript dumps.
Pricing
Fathom has the most generous free plan with truly unlimited recordings and transcriptions, though AI summaries on the free plan are basic. Its premium paid plan at $16 per month (or $20 monthly) unlocks advanced summaries, while the Team plan at $15 per user per month (billed annually) adds collaboration features. The Business plan at $25 per user per month is required for full CRM access.
Otter AI’s free plan allows 300 minutes of transcription per month, which is fairly limited for daily users. The Pro plan at $8.33 per user per month (billed annually) is the most affordable paid option among the three tools and includes Salesforce and HubSpot integrations. The Business plan at $19.99 per user per month adds concurrent meeting joining, unlimited recordings, and longer meeting durations up to four hours.
Fireflies offers a storage-capped free tier (800 minutes per seat), with its Pro plan at $10 per seat per month being the sweet spot for most teams. The Business plan at $19 per seat per month adds video recording and conversation intelligence. An Enterprise tier at $39 per seat per month covers HIPAA compliance, SSO, and private storage for larger organizations.
Supported Platforms
All three tools support Zoom, Google Meet, and Microsoft Teams. Fathom distinguishes itself with a native Zoom integration that does not require a bot to join the call, keeping the participant list clean and reducing friction for meeting hosts who prefer not to have an AI agent visibly present.
Otter AI adds in-person meeting support through its mobile app, which is a significant advantage for teams that mix video calls with physical meetings. Fireflies connects to the broadest range of downstream tools through 50+ integrations, including project management platforms, communication tools like Slack, and multiple CRM systems. It also supports uploading pre-recorded audio and video files for transcription.
For teams using Microsoft Teams heavily, all three tools work, but Fireflies has invested more in Teams-specific features compared to Fathom, which has historically been more Zoom-centric. Otter AI’s Teams integration is comparable to its Zoom integration with real-time transcription available in both environments.
Who Should Use Which?
Choose Fathom if you primarily use Zoom, want the best free plan available with no recording limits, and care about a clean, bot-free meeting experience. It is also the best option for Zoom-centric sales teams who want AI-powered coaching and deal insights without committing to an expensive enterprise contract. Fathom’s instant post-call summary delivery is genuinely best-in-class.
Choose Otter AI if you need to record both video calls and in-person meetings, require the highest transcription accuracy, or want real-time collaborative note-taking where your entire team can annotate during a live call. It is also the most affordable paid option at $8.33 per user per month for teams that need CRM integration. Students, journalists, and researchers will find Otter the most versatile because of its mobile app and broad audio input support.
Choose Fireflies.ai if your team runs a high volume of sales calls and needs automated CRM logging, topic tracking across meetings, conversation intelligence, and team performance analytics. The breadth of its integrations makes it the natural choice for RevOps teams, sales managers, and anyone who needs meeting data flowing automatically into other tools without manual effort. Its 100+ language support also makes it the right pick for globally distributed teams.
If budget is the primary concern and you only need basic functionality, Fathom’s free plan is the clear winner. If you are a growing startup that needs a bit of everything at a low cost, Fireflies Pro at $10 per seat per month offers the best value for paid plans.
Verdict
There is no single winner in this comparison because each tool targets a meaningfully different user. Fathom is the best free AI meeting assistant available right now, and its paid plans make sense for Zoom-centric teams that value simplicity and speed. Otter AI is the most accurate transcription tool and the only one that handles in-person meetings natively, making it the right choice for hybrid teams and non-video use cases. Fireflies.ai is the power user’s choice, with the deepest integrations, the most languages, and the best conversation intelligence for sales-driven organizations.
If forced to pick one for a typical business team that runs mostly video calls and wants to minimize administrative overhead, Fireflies Pro at $10 per seat per month offers the best combination of features, integrations, and value for money. But if you want to start for free and scale up only when necessary, Fathom makes that path completely painless.
You can also check out the best AI note-taking tools roundup on this site for a broader view of the category, including newer entrants worth considering alongside these three.
Frequently Asked Questions
Is Fathom really free?
Yes. Fathom’s free plan includes unlimited recordings and transcriptions with no monthly limits on the number of meetings you can capture. Basic AI summaries are included. Advanced summary templates, custom meeting bots, and CRM features require paid plans starting at $16 per month.
Does Otter AI work for in-person meetings?
Yes. Otter AI’s iOS and Android apps allow you to record and transcribe in-person conversations, making it the only tool in this comparison with strong native support for face-to-face meetings, lectures, and interviews that do not happen on a video call.
Which tool has the best CRM integration?
Fireflies.ai has the most comprehensive and automated CRM integration, connecting natively with Salesforce, HubSpot, Pipedrive, and Zoho CRM. It automatically logs call recordings, summaries, and action items into deal and contact records without requiring manual input from the user.
How accurate is the transcription for each tool?
Based on independent testing data, Otter AI achieves approximately 95% transcription accuracy, Fathom reaches around 92%, and Fireflies sits in the 90 to 93% range. All three perform better with clear audio and minimal background noise. Otter AI has the edge in multi-speaker and accent-heavy scenarios.
Can Fireflies.ai transcribe in languages other than English?
Yes. Fireflies supports transcription in over 100 languages, making it the best option for international teams. Fathom supports 38 languages, while Otter AI’s language support is more limited, focusing primarily on English, Spanish, and French.
Which tool is best for sales teams?
Fireflies.ai is generally the top pick for sales teams due to its automated CRM logging, conversation intelligence features, topic tracking across calls, and talk-time analytics. Fathom’s Business plan at $25 per user per month is also a strong option for Zoom-heavy sales teams that want AI scorecards and deal view dashboards.
Does Fathom join as a bot in meetings?
Not in Zoom meetings. Fathom has a native Zoom integration that does not require a separate bot to join the call as a visible participant. This is a notable difference from Otter AI and Fireflies, both of which join as visible bots. In Google Meet and Teams, Fathom does use a bot.
What happens to my recordings if I cancel a paid plan?
Policies vary by tool. Fathom’s free plan retains recordings indefinitely on its unlimited tier. Fireflies limits free storage to 800 minutes per seat. Otter AI’s free tier stores recordings but limits import and transcription access. It is always worth reviewing a tool’s data retention policy before committing to a plan.
Which tool has the best free trial or entry point?
Fathom wins here with no recording limits on its free plan. Fireflies gives you 800 minutes of storage before you hit the cap. Otter AI’s 300 monthly transcription minutes is the most restrictive free tier of the three, though it is still useful for occasional meeting recording.
Choosing between Fathom, Otter AI, and Fireflies comes down to three key questions: How much do you want to pay? Where do your meetings happen? And what do you need to do with the data after the call ends? Answer those three questions honestly and the right tool becomes obvious. For more help navigating the AI tools landscape, explore our guide to the AI tools for freelancers for other productivity picks worth adding to your stack.
