The Best Vapi Alternatives in 2026

Theneo creates API references, guides, changelogs, and private developer portals for documentation teams and AI agents.

Google AI for Developers provides Gemini and Gemma models, the Gemini API, and AI Studio for building developer applications.

Devin provides autonomous coding agent features for developers doing software engineering work.

ArchFormation lets users design cloud infrastructure visually and generate Terraform code for deploying systems to AWS.

SampleApp.ai provides a Stripe-like sample app experience for testing how coding agents work with an API.

VideoSDK gives developers APIs and SDKs for embedding voice agents, live audio and video calls, and interactive streaming.

Ludus AI provides Unreal Engine developers with tools for C++ code, Blueprints, scenes, sound, 3D models, and VFX.

Build and collaborate on web projects in StackBlitz’s browser-based IDE, with app generation through Bolt.

GoCodeo provides an AI coding agent for building, asking questions, and testing with LLMs.

TeamoRouter provides one API key for coding agents and offers provider setup and usage-based payment.

Anthropic’s Claude Code edits files, runs commands, and works with a codebase as a coding agent.

Search programming questions with Devv, a search engine built for developers.

ModelsLab offers APIs for generating images, video, audio, and language-model outputs across its model catalog.

TestMu AI provides a cloud testing platform with AI tools for software testing and agent assurance.

Kilo provides open-source AI coding assistance through VS Code, JetBrains, command-line, and cloud interfaces.

Heatbot uses uploaded heatmaps to generate redesigned website interfaces and code.

Sentry helps development teams find application errors and performance issues so they can investigate and fix them.

VibeKit provides an open-source React Native starter with ready-made features such as notifications and RevenueCat integration.

APIDNA builds AI agents that automate enterprise workflows such as reconciliation, compliance, and document operations.

A native macOS context engineering toolbox, Repo Prompt helps build AI prompts from code repositories.

Tavus provides real-time personified video applications that see, hear, and respond face to face.

OneSky centralizes AI translation and quality review across more than 100 languages while applying glossaries and brand rules.

CodeAnt analyzes code, infrastructure, and runtime to identify exploitable security issues through its agent-based security platform.

CTOP monitors the processes of AI coding agents through an interactive terminal viewer.