Deepgram vs Letterly: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
Deepgram
Deepgram is an AI-powered voice platform offering speech-to-text, text-to-speech, and voice agent APIs for developers.
Letterly
Letterly transforms your voice into polished, structured text using AI, perfect for messages, notes, and content creation.
Deepgram
Deepgram is an AI-powered voice platform offering speech-to-text, text-to-speech, and voice agent APIs for developers.
Letterly
Letterly transforms your voice into polished, structured text using AI, perfect for messages, notes, and content creation.
Deepgram
Real-time speech-to-text with 90%+ accuracy
Natural text-to-speech with Aura voices
Voice Agent API for conversational AI
30+ language support with accent handling
Speaker identification and separation
Custom model training available
Audio intelligence and sentiment analysis
On-premises deployment options
WebSocket and REST APIs
SDKs for multiple programming languages
Letterly
Real-time voice-to-text with AI enhancement
90+ language support with automatic detection
Up to 90 minutes recording per session
25+ rewrite options plus custom styles
Offline recording capability
Multi-platform sync (iOS, Android, web, macOS)
Screen-off recording mode
Integration with Google Docs, Notion via webhooks
Home screen widget for quick access
Translation and formatting tools
Deepgram
Deepgram uses a flexible credit-based pricing system that scales with your usage. New users receive $200 in free credits to explore all features without requiring a credit card. These credits never expire and cover speech-to-text, text-to-speech, and voice agent usage.
The main pricing tiers include:
Pay-As-You-Go - Use your free credits, then pay only for what you use with no minimums
Growth Plan ($4,000+/year) - Pre-paid annual credits with volume discounts and the same concurrency limits
Enterprise Plan (Custom) - Tailored pricing with the best discounts, custom models, priority support, and highest concurrency
Deepgram bills by the second for audio processing, so you pay exactly for what you use. The Growth plan offers 10% overage protection, and Enterprise customers get access to on-premises deployment, custom model training, and dedicated support teams.
Letterly
Letterly offers flexible pricing to suit different users and budgets. The app provides a free trial that lets you test all features before committing to a paid plan.
Regular pricing includes:
Annual Subscription - Starting at $70 per year for unlimited recordings and all rewrite options
Monthly plans - Available with pricing around $9 per month
AppSumo Lifetime Deals - Occasional lifetime access deals starting from $69 for single device use
All paid plans include unlimited recordings, transcriptions, and rewrites, access to all 25+ rewrite options, multi-language support, offline recording, and integrations with third-party tools. The company also offers enterprise pricing for teams and businesses with custom requirements. Students and educational users may qualify for special discounts. Letterly provides a 60-day money-back guarantee, allowing you to try the service risk-free.
