Search / Audio API AI API routers & providers

Deepgram is a specialized speech-to-text and text-to-speech API provider. It offers high-performance audio models like Nova-3 and Flux, with real-time streaming and batch processing capabilities. Authentication is via API key created in its own dashboard.

You.com provides a specialized Web Search API for AI agents and LLM applications. It offers real-time web intelligence and structured search results (snippets, full text). Features a consumption-based pricing model and generous onboarding credits for new developers.

Gladia is a speech-to-text API provider offering high-accuracy asynchronous and real-time transcription across 100+ languages. It features speaker diarization and automatic language detection, billed via a prepaid credit wallet system with a significant free starting grant.

Exa is an internet-scale search and content extraction API designed for AI agents. It features embeddings-based search, deep research capabilities, and structured content retrieval. Details were checked against the provider's own page at exa.ai.

Firecrawl is a search and scrape API designed to turn websites into LLM-ready markdown. It supports crawling, scraping, and real-time search with a usage-based credit system. Details were checked against the provider's own page at www.firecrawl.dev.

ElevenLabs is a leading AI audio platform providing high-fidelity text-to-speech, speech-to-speech, and voice cloning APIs. It supports multiple languages and low-latency streaming for voice agents. Details were checked against the provider's own page at elevenlabs.io.

Fish Audio is a leading AI speech platform offering state-of-the-art text-to-speech, voice cloning, and speech recognition. It features the S2.1 Pro model with high quality and low latency. Users authenticate with an API key and are billed via a credits-based pay-as-you-go system.

AssemblyAI is a leading speech-to-text API provider offering high-accuracy transcription (Universal-3.5 Pro) and a multi-model LLM Gateway. It supports OpenAI-compatible routing for its language model features. Access is pay-as-you-go after a free trial.

Brave Search API offers privacy-preserving web search results for AI grounding. It features a $5 monthly free credit and is priced per 1,000 queries plus token usage for the LLM-powered context features.

Cartesia offers ultra-fast text-to-speech (Sonic) and speech-to-text (Ink) APIs. It uses a credit-based subscription model starting at $5/mo, with a free tier providing 20,000 credits monthly for development.

Google Programmable Search (Custom Search) provides a RESTful JSON API to retrieve web and image search results. As of 2026, the service is discontinued for new customers and will be decommissioned in early 2027. It offers 100 free queries per day for existing users.

Inworld AI provides a sophisticated platform for realtime AI characters and audio/speech APIs. It features low-latency TTS (Text-to-Speech) and STT (Speech-to-Text) with specific optimization for interactive applications. The platform includes an LLM router for character brains.

Linkup Search is a specialized search API designed for AI agents. It provides real-time access to web content, including deep search capabilities for technical and legal data. It offers a generous free tier of 4,000 queries for new users.

PlayHT is an AI-driven text-to-speech platform providing realistic synthetic voices and voice cloning via a REST API. It serves professional creators and developers with multiple voice models, including its proprietary PlayHT 2.0 and 3.0 engines.

Rev AI provides a suite of speech-to-text APIs powered by Rev's proprietary speech engine. It offers high-accuracy asynchronous and real-time transcription, as well as language identification and topic extraction for developers building voice-enabled applications.

SearchAPI is a real-time SERP scraping API providing structured data from Google, Bing, Baidu, and more. It is designed for AI agents and developers, offering an OpenAI-compatible interface and a focus on 'pay-per-success' results.

Serper Search is a specialized Google Search API designed for speed and cost-efficiency in AI agent and RAG workflows. It returns structured JSON for Search, Images, News, Maps, and more. Authentication is via API key with a generous free tier for new users.

Soniox is an AI speech platform providing high-accuracy Speech-to-Text and Text-to-Speech APIs. It features token-based pricing for both transcription (Async and Real-time) and speech generation. It supports over 60 languages with bundled features like diarization.

Speechmatics is an enterprise-grade speech-to-text platform offering high-accuracy transcription in over 50 languages. It supports both batch and real-time processing with specialized models like 'Melia' for optimized performance.

Tavily is an AI-optimized search engine designed for LLMs and RAG systems. It provides structured, clean web data and content extraction without the need for manual scraping. It offers an API with a free monthly credit allowance.