The best Google Antigravity alternatives

Claude Code provides a terminal-native agentic development experience powered by Anthropic's Claude 3.5 and 3.7 models, running identically across command-line interfaces, desktop apps, IDEs, and browser views. It natively executes shell commands, automates multi-file code refactoring, handles git branching and CI tasks, and allows deep project extensibility through Model Context Protocol (MCP) integrations, skills, and lifecycle hooks.

Best for: Developers wanting a lightweight, terminal-first agent with strong multi-surface consistency and standard MCP ecosystem extensibility.

Consider: Access is tied to an active Claude Pro subscription starting at $20 per month or separate usage-based Anthropic Console API billing rather than existing as an independent tool purchase.

DeepSeek Harness is an MIT-licensed, completely self-hosted agent platform built around an unprivileged plugin architecture where every subsystem can be swapped through configuration. Core capabilities, including the agent loop, session management, tool registries, model adapters, and sandboxes, exist as customizable seams, providing both a local web interface and headless runners without requiring a vendor account.

Best for: Platform teams and infrastructure engineers requiring complete architecture sovereignty, custom internal model routing, and zero tool subscription costs.

Consider: The repository is explicitly positioned as a rapidly iterating developer preview with breaking changes, and the burden of implementing safe sandboxing and process confinement falls entirely on the hosting team.

Grok Build packages an autonomous terminal agent written in Rust into an interactive fullscreen text user interface, a headless runner for CI scripts, and an Agent Client Protocol plugin for editors. It offers strict human oversight through an integrated plan mode that blocks file modifications until explicit approval is granted, and it supports parallel subagents operating within dedicated git worktrees.

Best for: Engineers seeking an interactive TUI with strict plan-verification guardrails and headless automation for continuous integration pipelines.

Consider: Initial activation requires authenticating with an xAI account or providing an XAI_API_KEY before third-party OpenAI-compatible endpoints can be configured, and its repository does not accept external contributions.

OpenAI Codex unifies agentic coding workflows across a command-line utility, IDE extensions, desktop ChatGPT interfaces, and remote cloud agents under a single account. It handles multi-file exploration, code diagnosis, and automated tasks, and features remote background workers that perform work off the local machine before returning suggested diffs.

Best for: Teams already standardizing on ChatGPT workspace plans who want unified multi-device continuity and hands-off cloud agent execution.

Consider: Operating the CLI purely against an OpenAI API key completely disables its managed cloud features, and exceeding plan allowances requires purchasing supplemental per-model usage credits.

Devin Desktop, formerly Windsurf, delivers an integrated agent command center inside a dedicated desktop IDE that operates directly on the local filesystem while managing concurrent agent sessions. It combines deep codebase indexing, predictive terminal commands, and seamless coordination between local editing and autonomous Devin cloud sessions.

Best for: Developers who want an all-in-one visual IDE combining local reactive editing with the ability to orchestrate autonomous cloud agent instances.

Consider: Paid tiers rely on allowances that refresh on strict daily and weekly cycles with overages charged at API rates, and team adoption introduces an $80 monthly platform fee alongside individual seat charges.

Cursor is an AI-first code editor built on a fork of VS Code, focusing on precision human-in-the-loop workflows like diff-by-diff composer edits, multi-line tab predictions, and state rollbacks via checkpoints. Beyond the local editor, its Background Agents can run automated coding runs against remote repositories via an accessible API.

Best for: Programmers who prioritize granular oversight, instant snapshot rollbacks, and fast predictive completions within a familiar VS Code desktop workflow.

Consider: Usage allowances for higher-capacity frontier models are metered against fixed subscription quotas that deplete rapidly during sustained coding, and background agents incur separate usage charges.