Lemonfox
Budget-friendly AI APIs focused on Speech-to-Text transcription (Whisper v3), plus Text-to-Speech and image generation.
Last verified:
What is Lemonfox?
Lemonfox.ai is an affordable, OpenAI-compatible API platform that provides access to state-of-the-art open-source AI models for developers and businesses. The platform offers four main APIs: speech-to-text (Whisper large-v3), text-to-speech, open-source LLM chat (powered by Llama 3.1 8B and Llama 3.3 70B), and image generation (Stable Diffusion XL). It is trusted by over 10,000 developers and serves as a cost-effective alternative to OpenAI, ElevenLabs, and other premium AI services.
Key features include support for 100+ languages with translation capabilities in the speech-to-text API, speaker recognition (diarization) to identify different voices in conversations, high-accuracy transcriptions with minimal latency, and 50+ AI voices across 8 languages for text-to-speech. The LLM chat API delivers ChatGPT-level performance at 5 times cheaper than GPT-4o, while the image API generates stunning graphics and illustrations in seconds. All data is securely processed and deleted immediately after use, with EU-based processing available for regulatory compliance.
Lemonfox.ai is ideal for developers building voice-enabled apps, automated customer support systems, meeting summaries, podcasts transcription, interviews, global applications requiring multi-language support, and creative projects needing high-quality image generation. The OpenAI-compatible API makes it easy to switch from existing providers with minimal integration effort.
Lemonfox pricing
Pricing model: Freemium
First month is free with 10 million credits included (covers 30 hours speech-to-text, 2 million characters text-to-speech, 10 million LLM tokens, or 1,000 images). The Standard plan starts at $5/month with the same 10 million credits. Additional usage costs $0.50 per 1 million credits (equivalent to 3 hours speech-to-text or 200k characters TTS). Whisper API is priced at $0.17/hour (50% lower than OpenAI's $0.36/hour). LLM chat API costs $0.50 per 1 million tokens for llama-8b-chat and $1.25 per 1 million tokens for llama-70b-chat. Text-to-speech costs $2.50 per 1 million characters. EU-based processing adds a 20% surcharge.
Lemonfox pros
- First month free with 10 million credits included
- 5 times cheaper than GPT-4o for LLM chat API
- Most affordable Whisper API on the market at $0.17/hour
- Supports 100+ languages with translation options
- Speaker recognition (diarization) for identifying multiple voices
- 50+ AI voices across 8 languages for text-to-speech
- Save up to 90% compared to ElevenLabs for TTS
- OpenAI-compatible API for easy switching
- Llama 3.3 70B model for most accurate results
- Stable Diffusion XL for high-quality image generation
- EU-based processing available for regulatory compliance
- All data deleted immediately after processing
- Minimal latency for fast transcriptions
- Trusted by 10,000+ developers
- Self-serve signup with no sales call required
- Simple incremental pricing at $0.50 per additional 1 million credits
- API playground for testing models before integration
Lemonfox cons
- Limited to only two Llama models (8B and 70B)
- No GPT-4 or other closed-source models available
- EU-based processing incurs 20% surcharge
- Image generation limited to Stable Diffusion XL only
- No public API documentation URL easily discoverable
- Audio-to-text API was announced but not yet fully launched
- Plan structure not clearly surfaced on pricing page
- No free tier beyond the first month trial
- Voice options limited to 8 languages only
Frequently asked questions about Lemonfox
How do I open a Lemonfox account?
Visit the Lemonfox.ai website, click on the Sign Up button, and choose to sign up with Google or continue with your email. If using email, enter your name and password in the respective fields, then click Sign Up to create your account. After creating your account, you can start using the services and generate an API key to authenticate your requests.
What is the pricing for Lemonfox.ai?
Lemonfox.ai offers a straightforward pricing structure starting at $5.00 per month for the Standard plan, which includes 10 million credits (covering 10 million LLM chat tokens, 1,000 images, 30 hours speech-to-text, or 2 million characters TTS). The first month is free with the same 10 million credits. Additional usage beyond these limits is billed incrementally at $0.50 per additional 1 million credits. Whisper API is $0.17/hour, and TTS is $2.50 per 1 million characters.
What AI models does Lemonfox support?
Lemonfox supports state-of-the-art open-source AI models including Whisper large-v3 for speech recognition, Llama 3.1 8B and Llama 3.3 70B for chat/LLM tasks, and Stable Diffusion XL for image generation. The Llama models excel in commonsense reasoning, world knowledge, reading comprehension, and code-related tasks.
Is Lemonfox.ai OpenAI-compatible?
Yes, Lemonfox.ai provides an OpenAI-compatible API that makes it easy to switch from existing OpenAI services. The chat API endpoint follows the same format as OpenAI's, taking a list of messages as input and providing an AI-generated assistant message as output. You only need to create an API key and change the endpoint URL.
How many languages does the speech-to-text API support?
The speech-to-text API supports over 100 languages with seamless translation options available within the API. This makes it perfect for global applications requiring multi-language transcription and translation capabilities.
What is speaker recognition (diarization)?
Speaker recognition, also called diarization, is a feature that identifies different speakers in the audio by analyzing voice patterns. This allows you to accurately distinguish between multiple voices in a conversation, making it ideal for interviews, meetings, podcasts, and customer calls where knowing who spoke is important.
How secure is my data with Lemonfox.ai?
Privacy and security are Lemonfox's top priority. All data is securely processed and deleted immediately after processing. The platform also offers EU-based processing options to meet regulatory requirements. No data is stored long-term, ensuring maximum privacy protection for your audio and text submissions.
What voices are available for text-to-speech?
Lemonfox supports 50+ voices across 8 languages for text-to-speech. Voices include different accents and languages, allowing you to choose the right voice for your application. The API is compatible with both OpenAI's and ElevenLabs' APIs for easy integration.
Can I test the API before paying?
Yes, you can test the API for 1 month completely free with no hidden costs or complex setup. The free trial includes 10 million credits, which is enough for 30 hours of transcription, 2 million characters of text-to-speech, 10 million LLM tokens, or 1,000 images. No credit card is required to start.
What image generation model does Lemonfox use?
Lemonfox uses Stable Diffusion XL for image generation, which creates stunning, high-quality images, graphics, and illustrations in a few seconds. This model is designed for creating professional-quality visuals for various creative projects and is significantly more affordable than competing image generation APIs.