Speak is an AI-powered language learning app built around spoken conversation practice from the first session. It uses a structured AI tutor that assigns topics, guides conversation, corrects errors in real time, and tra
TL;DR:Speak is a strong AI language speaking app for purpose-built ai conversation engine that provides real-time error correction and feedback. Lucy OS1 leads on languages for ai voice conversation and cross-session conversational memory, bringing cross-session memory that tracks your vocabulary gaps, real-time AI voice conversation at under 600ms, and support for 19 languages with no scheduling required. Speak has a free tier. Lucy OS1 also has a free tier, and adds cross-session memory that makes your AI language tutor more effective with every session.
Lucy OS1
Real-time AI voice conversation in 19 languages at under 600ms. Cross-session memory that tracks your vocabulary gaps and pronunciation patterns. Available any time without scheduling. Also handles your calendar, email, and daily tasks beyond language learning.
Pricing: $20/month or $180/year
Speak · Speak (speak.com)
AI language speaking app. Speak is an AI-powered language learning app built around spoken conversation practice from the first session. It uses a structured AI tutor that assigns topics, guides conversatio
Pricing: Free tier (limited). Speak Premium approximately $17/month monthly or $99/year ($8.25/month). Speak Premium Plus approximately $165/year. Prices vary by region.
Key strengths:
| Feature | Lucy OS1 | Speak |
|---|---|---|
| Languages for AI voice conversation |
19 languages
Spanish, French, German, Italian, Portuguese, Dutch, Swedish, Norwegian, Danish, Greek, Russian, Ukrainian, Polish, Japanese, Mandarin, Korean, Arabic, Hindi, Turkish.
|
6 languages
Speak currently supports Spanish, French, Korean, Japanese, Italian, and Simplified Chinese. German and other languages are not available.
|
| Cross-session conversational memory |
Yes, persistent across all sessions
Lucy OS1 remembers what vocabulary you struggled with, what you practiced last session, and your conversational patterns. Each session builds on the previous one.
|
Progress tracking but no conversational memory
Speak tracks which lessons you completed and your vocabulary scores but does not retain a memory of your conversational responses or adapt dynamically based on your history.
|
| Conversation freedom |
Fully open: any topic, any direction
Talk about your actual life, your work, your news, your weekend plans. No curriculum gates or AI-assigned topics required.
|
Guided by AI-assigned lesson topics
Speak Tutor assigns topics and conversation starters. While it allows some open-ended conversation within a session, it does not give you the same topic freedom as an open AI conversation partner.
|
| Real-time error correction and feedback |
Conversational guidance, not structured feedback
Lucy OS1 helps you find the right words and models correct usage in conversation but does not score your responses or provide formal correction breakdowns.
|
Structured real-time error correction
Speak identifies grammar errors and vocabulary mistakes in your responses and provides explanations. This structured feedback is a core part of the product experience.
|
| Voice response speed |
Under 600ms end-to-end
Lucy OS1 Natural Voice Recognition, Natural Voice Intelligence, and Natural Voice Synthesis optimized for natural real-time conversation rhythm.
|
Comparable but not published
Speak is designed for real-time conversation and response speed is acceptable, but the company does not publish latency benchmarks.
|
| General AI assistant beyond language |
Full AI assistant with calendar, email, memory
Lucy OS1 reads your Google Calendar, your inbox, and stores memories about your context. It is useful beyond language practice as a daily AI assistant.
|
Language learning only
Speak is a single-purpose language app. It does not access your schedule, your email, or your broader personal context.
|
| Annual pricing |
$180/year for unlimited sessions in 19 languages
One price for unlimited voice conversations in all 19 supported languages with no daily session caps.
|
Approximately $99/year for Premium
Speak Premium at $99/year ($8.25/month) covers all 6 supported languages. Premium Plus at approximately $165/year adds more features.
|
| Platform |
Any browser, Mac app, any device
No app download required. Works on any browser on Mac, Windows, Linux, iOS, or Android.
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Mobile app primarily
Speak is primarily designed as a mobile app for iOS and Android. Web access exists but mobile is the primary experience.
|
Lucy OS1 is free to try. No credit card required to start your first language session.
Start Learning FreeFree tier available. No credit card required.
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