🧪 Head-to-Head Accuracy Testing
📊 Testing Methodology
We tested all platforms using identical audio files across various scenarios to ensure fair comparison. Each platform processed the same content under identical conditions.
🎯 Test Scenarios:
- 2-person interview: Clear audio, distinct voices
- 5-person team meeting: Mixed audio quality
- 10-person conference: Maximum capacity stress test
- Noisy environment: Background noise simulation
- Accented speech: International speakers
📏 Accuracy Metrics:
- Correct identification: Speaker correctly labeled
- False positives: New speaker created incorrectly
- Missed detection: Speaker change not recognized
- Consistency score: Stable labeling throughout
- Processing speed: Real-time performance
🏆 Detailed Results by Scenario
📞 2-Person Interview Results:
Rev.ai
95%
Nearly perfect
Fireflies
92%
Excellent
Notta
89%
Very good
Otter.ai
87%
Good
Sembly
84%
Decent
👥 5-Person Team Meeting Results:
Rev.ai
90%
Consistent leader
Fireflies
86%
Strong performance
Notta
82%
Good handling
Otter.ai
79%
Some confusion
Sembly
76%
Struggled
🎪 10-Person Conference Results:
Rev.ai
85%
Best at scale
Fireflies
78%
Hit limits
Notta
72%
10-speaker max
Otter.ai
68%
Significant issues
Sembly
62%
Poor at scale
🔍 Feature Comparison Matrix
| Feature | 🔥 Fireflies | 📝 Rev.ai | 🌍 Notta | 🦦 Otter | 🤖 Sembly |
|---|---|---|---|---|---|
| Accuracy Rate | 88% | 92% | 85% | 83% | 81% |
| Max Speakers | 20 | 25 | 10 | 10 | 15 |
| Real-time Processing | 3-7 sec | Near real-time | 2-5 sec | 1-3 sec | 2-4 sec |
| Custom Speaker Names | ✅ AI + Manual | ✅ Full AI | ⚠️ Manual only | ✅ AI + Manual | ✅ AI + Manual |
| Speaker Analytics | ✅ Advanced | ⚠️ Basic | ⚠️ Basic | ✅ Good | ✅ Advanced |
| Language Support | 69 languages | 36 languages | 104 languages | English only | English only |
| Free Minutes | 800/month | 300/month | 120/month | 300/month | 450/month |
| Pro Plan Pricing | $10/month | $0.025/min | $8.25/month | $10/month | $10/month |
🔥 Fireflies Deep Dive Analysis
✅ Fireflies Strengths
🏆 Technical Advantages:
- 88% accuracy: Second-best overall performance
- 20 speaker support: Handles large meetings well
- Smart speaker naming: AI-suggested names from context
- Voice signatures: Remembers speakers across sessions
- Advanced analytics: Talk time, interruption patterns
💼 Business Features:
- CRM integration: Automatic contact matching
- Team collaboration: Shared speaker libraries
- Meeting insights: Speaker engagement scoring
- Custom fields: Speaker role tagging
- API access: Developer-friendly integration
⚠️ Fireflies Limitations
🔧 Technical Constraints:
- Processing delay: 3-7 seconds vs. Otter's 1-3
- Background noise sensitivity: Performance drops in noisy environments
- Similar voice confusion: Struggles with family members
- Cross-talk handling: Issues with overlapping speech
- Accent adaptation: Slower learning for non-native speakers
💰 Cost Considerations:
- Storage limits: 8-hour retention on free plan
- Per-user pricing: Costs scale linearly with team size
- Feature restrictions: Advanced analytics require Business plan
- Integration costs: Some CRM connections require higher tiers
- Export limitations: Format restrictions on lower plans
🎯 Best Platform by Use Case
🏢 Business Meeting Scenarios
👥 Small Team Meetings (2-5 people)
🥇 Best: Fireflies
86% accuracy, great team features, CRM integration
🥈 Alternative: Rev.ai
90% accuracy, pay-per-use pricing
🎪 Large Meetings (6-15 people)
🥇 Best: Rev.ai
85% accuracy at scale, 25 speaker support
🥈 Alternative: Fireflies
78% accuracy, 20 speaker limit
🌍 International Teams
🥇 Best: Notta
104 languages, good accent handling
🥈 Alternative: Fireflies
69 languages, strong business features
🎯 Specialized Use Cases
💰 Sales Teams
🥇 Winner: Fireflies
- • CRM auto-sync
- • Deal tracking
- • Client interaction history
- • Revenue intelligence
🎓 Education & Training
🥇 Winner: Otter.ai
- • Student-teacher optimization
- • Education pricing
- • Note-taking integration
- • Fast processing
🔬 Research & Legal
🥇 Winner: Rev.ai
- • Highest accuracy (92%)
- • Precise timestamps
- • Custom vocabularies
- • API flexibility
💰 Cost-Benefit Analysis
📊 Value Comparison (Monthly Usage: 1,000 minutes)
| Platform | Monthly Cost | Accuracy | Cost/Hour | Value Score |
|---|---|---|---|---|
| 🔥 Fireflies Pro | $10 | 88% | $0.60 | 🟢 Excellent |
| 📝 Rev.ai | $25 | 92% | $1.50 | 🟡 Premium |
| 🦦 Otter Pro | $10 | 83% | $0.60 | 🟡 Good |
| 🌍 Notta Pro | $8.25 | 85% | $0.50 | 🟢 Great Value |
| 🤖 Sembly Pro | $10 | 81% | $0.60 | 🟡 Decent |
🎯 Decision Framework
✅ Choose Fireflies If:
- • You need strong business features
- • CRM integration is important
- • Team collaboration is key
- • 88% accuracy is sufficient
- • Budget is $10-20/month per user
- • Meeting size is typically 2-15 people
⚠️ Consider Alternatives If:
- • You need 90%+ accuracy (Rev.ai)
- • Budget is very limited (Notta free)
- • English-only environment (Otter)
- • Multilingual needs (Notta)
- • Large meetings 15+ people (Rev.ai)
- • Real-time speed critical (Otter)
🏆 Final Recommendations
🥇 Overall Winner: Fireflies
8.5/10
Best balance of accuracy, features, and value
- ✅ 88% accuracy (2nd best)
- ✅ Excellent business features
- ✅ Great team collaboration
- ✅ Strong CRM integrations
- ⚠️ Slower than Otter real-time
🥈 Accuracy Leader: Rev.ai
9.2/10
Highest accuracy, best for critical use
- ✅ 92% accuracy (best)
- ✅ 25 speaker support
- ✅ Developer-friendly API
- ✅ Pay-as-you-go pricing
- ⚠️ Limited business features
🥉 Budget Choice: Notta
7.8/10
Best value for multilingual teams
- ✅ 85% accuracy
- ✅ 104 languages
- ✅ Lowest pricing ($8.25)
- ✅ Good for international teams
- ⚠️ 10 speaker limit