Top AI tools for # function calling

Symphony enables developers to build applications that understand and respond to natural language commands by linking text inputs to executable code functions.

• Contact for Pricing

FriendliAI provides a high-performance platform for accelerating generative AI inference, enabling fast, cost-effective, and reliable deployment and serving of Large Language Models (LLMs).

• Usage Based

Fastino is an AI research lab developing small, task-optimized language models for enterprises, focusing on accuracy, speed, and efficient deployment for PII redaction, data structuring, and more.

• Contact for Pricing

RubyLLM provides a unified Ruby API for interacting with multiple AI providers like OpenAI, Anthropic, Gemini, and more, simplifying AI integration for Ruby developers.

• Free

Nexa AI is an on-device Generative AI development platform enabling businesses and developers to build and deploy high-performance, optimized AI applications locally across any hardware.

• Contact for Pricing

Arch Gateway is an AI-native proxy server designed to help developers build sophisticated agentic AI applications by simplifying prompt processing, security, observability, and integration.

• Free

Superinterface enables businesses to add interactive AI user interfaces to their products, featuring components like voice chats and API function calling, compatible with various AI models.

• Free Trial
• From 49$

Astra Platform is a universal API designed to enhance Large Language Models (LLMs) with function calling capabilities, enabling seamless integration with over 2,200 applications.

• Contact for Pricing

Promptotype is a platform designed for structured prompt engineering, enabling users to develop, test, and monitor LLM tasks efficiently.

• Freemium
• From 6$

OpenTools provides a unified API enabling developers to connect Large Language Models (LLMs) with a diverse ecosystem of tools, simplifying integration and management.

• Usage Based

Gorilla is an open-source Large Language Model (LLM) developed by UC Berkeley, designed to interact with a wide range of services by invoking API calls.

• Free

Toolhouse is a complete cloud infrastructure platform that enables developers to equip LLMs with actions and knowledge using just 3 lines of code, offering a Tool Store for instant integration of AI capabilities.

• Freemium

Exfunc provides a Web Task API allowing users and AI agents to fetch data and perform actions on the web via simple API calls.

• Freemium

Rubra provides a collection of open-weight large language models (LLMs) enhanced with tool-calling capabilities, ideal for building AI agents.

• Free

Cheshire Cat AI is a framework for building, training, and deploying customizable AI agents. It allows users to train agents on their documents and connect them to external APIs and applications.

• Free

AgentRPC is a universal RPC layer designed to unify tools from multiple programming languages into a single interface for AI agents, enabling connectivity across networks, including private VPCs.

• Freemium
• From 20$

ResponseCX provides AI-powered customer service for Shopify brands, automating ticket resolution, order changes, and returns with 24/7 availability and high customer satisfaction.

• Paid
• From 1520$

Mistral AI is a research lab developing state-of-the-art open-source and commercial Large Language Models (LLMs) for developers and enterprises.

• Other

BoundaryML (BAML) is a language designed for reliable structured text generation from Large Language Models (LLMs). It offers features like JSON error correction, schema coercion, and improved function-calling.

• Freemium

Chatsistant is a comprehensive conversational AI framework platform that allows businesses to build and deploy AI chatbots for enhanced customer experience and operational efficiency.

• Freemium
• From 10$

Superface is a connectivity tooling platform for AI agents that enables seamless integration of external apps with intelligent tools, featuring managed OAuth and end-user authentication flows.

• Contact for Pricing

Composio is a developer-first integration platform that connects AI agents and LLMs with over 250 tools and services, offering managed authentication and improved reliability for building AI-powered applications.

• Freemium
• From 199$