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Antigravity vs Base44 vs Bolt

Test every candidate on the same real task, input quality and acceptance criteria. The winner is the most usable result—not the longest feature list.

Source-backed brief

Antigravity

Google Antigravity is an agent-first development system spanning a standalone desktop command centre, IDE, terminal interface and software-development kit. It is designed for delegating multi-step coding and knowledge work across files, terminals, browsers, workspaces and subagents while returning reviewable plans, diffs and visual artifacts.

Public and subscription-linked access varies by surface; verify current eligibility and quotas / antigravity.googleOpen profile →

Source-backed brief

Base44

Base44 is a prompt-led application builder with managed hosting, authentication, data entities, backend functions, integrations and an editable code path. It can move a non-technical operator from a product description to a working shared application, while developer tools and exports provide an escape hatch for deeper customization.

Free credits and paid plans with feature and export limits; verify current allowances / base44.comOpen profile →

Source-backed brief

Bolt

Bolt is a browser-based AI builder for JavaScript websites, full-stack web applications and Expo-oriented mobile projects. Its agent can create and edit code, provision a managed database, authentication and hosting, or connect external services, giving users a fast build loop without hiding the underlying project files.

Token-based free and paid plans plus cloud-service limits; verify current terms / bolt.newOpen profile →

Side-by-side decision table

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Platform	Pricing	Capabilities	Best fit	Cautions
Antigravityantigravity.googleSource-backed brief	Public and subscription-linked access varies by surface; verify current eligibility and quotas	Desktop orchestration across projects and worktrees · IDE and terminal coding-agent surfaces · Parallel subagents and scheduled tasks · Browser, MCP, skills and plugin integrations	Developers coordinating several bounded repository tasks · Long-running feature, maintenance and verification work that benefits from isolated worktrees · Teams extending agents with reviewed skills, MCP servers or SDK policies	Unsupervised production or infrastructure changes without approval and rollback gates · Repositories that cannot be exposed to the selected local or hosted execution mode · Treating an agent-generated walkthrough as proof that every requirement passed
Base44base44.comSource-backed brief	Free credits and paid plans with feature and export limits; verify current allowances	Prompt-generated interfaces, data entities and application flows · Managed authentication, hosting and backend functions · App visibility and role-aware data-access rules · Code, ZIP and GitHub export options	Internal tools, portals, booking systems and lightweight business applications · Non-technical teams that value integrated hosting and authentication · Projects that may later need GitHub export or developer customization	Copying a third-party website without rights to its design or content · High-risk applications launched without role, data-isolation and security testing · Teams requiring an unrestricted custom infrastructure stack from the outset
Boltbolt.newSource-backed brief	Token-based free and paid plans plus cloud-service limits; verify current terms	Prompt-led JavaScript web and application development · Browser code editor, preview and troubleshooting loop · Bolt database, authentication, secrets and server functions · Built-in hosting and custom-domain paths	JavaScript websites, SaaS prototypes and operational web applications · Builders wanting code visibility without local environment setup · Expo-compatible mobile concepts that can be validated incrementally	PHP or Python backend requirements without an external architecture · Assuming a UI rollback also restores an attached production database · Payment, authentication or webhook launches without server-side and failure-path testing