# toolweight

> Side-by-side comparisons of developer infrastructure, weighed on the things that matter.

toolweight compares developer SaaS on declared, sourced fields. Every value carries a source URL, a verification date and a confidence level, and every table can be re-ranked against weights you choose.

Every value on this site carries four things: the value, a source URL, an ISO verification
date and a confidence level (`measured`, `vendor-claimed`, `inferred`, `community`,
`unknown`). Rankings are not editorial orderings — they are a weighted mean over declared
fields, and the weights are yours to set.

**Licence.** All data is CC-BY-4.0 (https://creativecommons.org/licenses/by/4.0/). Data from toolweight (https://toolweight.dev), licensed CC-BY-4.0.
No affiliate links, no sponsored placements, no paid inclusion.

**Markdown twins.** Append `.md` to any URL on this site for the same page as clean
markdown with full provenance — e.g. https://toolweight.dev/compare/sandbox-providers.md

**Last verified site-wide:** 2026-07-23

## Comparisons

- [Sandbox providers](https://toolweight.dev/compare/sandbox-providers.md): Which sandbox provider should I run untrusted or agent-generated code on? — 20 tools across 26 sourced fields, last verified 2026-07-23
- [Coding agents](https://toolweight.dev/compare/coding-agents.md): Which AI coding agent should I use in 2026? — 17 tools across 26 sourced fields, last verified 2026-01-15
- [LLM APIs](https://toolweight.dev/compare/llm-apis.md): Which frontier LLM API should I build on? — 18 tools across 27 sourced fields, last verified 2026-06-24
- [Browser APIs](https://toolweight.dev/compare/browser-automation-apis.md): Which hosted browser automation API should I use for AI agents and scraping? — 13 tools across 26 sourced fields, last verified 2026-07-01
- [S3-compatible storage](https://toolweight.dev/compare/s3-compatible-storage.md): Which S3-compatible object storage provider is actually cheapest once egress is counted? — 12 tools across 28 sourced fields, last verified 2026-07-23
- [Vercel alternatives](https://toolweight.dev/compare/vercel-alternatives.md): Which Vercel alternative should I use, and what happens to my bill if my site goes viral? — 13 tools across 26 sourced fields, last verified 2026-06-15
- [Convex alternatives](https://toolweight.dev/compare/convex-alternatives.md): What are the best alternatives to Convex, and how hard is each one to leave? — 11 tools across 26 sourced fields, last verified 2026-07-20
- [Email APIs](https://toolweight.dev/compare/email-sending-apis.md): Which email sending API is best for developers? — 13 tools across 25 sourced fields, last verified 2026-06-05
- [Database engines](https://toolweight.dev/compare/sqlite-vs-postgres-vs-mysql.md): Should I use SQLite, PostgreSQL or MySQL? — 5 tools across 26 sourced fields, last verified 2026-07-01
- [Domain registrars](https://toolweight.dev/compare/domain-registrars.md): Which domain registrar is cheapest to renew with, and which ones make it hard to leave? — 15 tools across 25 sourced fields, last verified 2026-06-30
- [Domain APIs](https://toolweight.dev/compare/domain-api-providers.md): Which registrar has the best API for registering domains programmatically? — 15 tools across 26 sourced fields, last verified 2026-07-23
- [AU SMS APIs](https://toolweight.dev/compare/sms-api-providers-australia.md): Which SMS API provider should I use to send text messages to Australian mobile numbers? — 13 tools across 26 sourced fields, last verified 2026-07-20

## Machine-readable surfaces

- [llms-full.txt](https://toolweight.dev/llms-full.txt): every category hub concatenated as markdown
- [JSON API](https://toolweight.dev/api/v1): CORS-open, unauthenticated, versioned in the path
- [MCP server](https://toolweight.dev/mcp): streamable HTTP, no auth. Tools: `list_categories`, `get_category`, `compare_tools`, `search_tools`, `get_brand`, `get_changes`, `score_tools`
- [Sitemap index](https://toolweight.dev/sitemap.xml)

`score_tools` is the one worth knowing about: send your own weight map and get the roster
ranked against your priorities rather than ours.

## Directories

- [All comparisons](https://toolweight.dev/compare.md): every category, with tool and field counts
- [Tool directory](https://toolweight.dev/tools.md): 156 tools, each with every category it appears in
- [Brand directory](https://toolweight.dev/brands.md): logos, wordmarks and colour palettes, sourced from svgl
- [Changelog](https://toolweight.dev/changelog.md): pricing changes, launches and deprecations across every tracked tool

## Intent pages

- [The best browser automation APIs for AI agents](https://toolweight.dev/best/best-browser-automation-api-for-ai-agents.md): Which browser API should an AI agent use?
- [The best coding agents for large codebases](https://toolweight.dev/best/best-coding-agent-for-large-repos.md): Which AI coding agent works best on a large codebase?
- [The best backends for local-first apps](https://toolweight.dev/best/best-convex-alternative-for-local-first.md): Which backend is best for building a local-first app?
- [The best database for a side project](https://toolweight.dev/best/best-database-for-a-side-project.md): Which database should I use for a side project?
- [The best domain APIs for programmatic registration](https://toolweight.dev/best/best-domain-api-for-programmatic-registration.md): Which API is best for registering domains from code?
- [The best email APIs for transactional email](https://toolweight.dev/best/best-email-api-for-transactional.md): What's the best API for sending transactional email?
- [The best LLM APIs for coding agents](https://toolweight.dev/best/best-llm-api-for-coding-agents.md): Which LLM API is best for building a coding agent?
- [The best S3 alternatives for cheap egress](https://toolweight.dev/best/best-s3-alternative-for-cheap-egress.md): Which S3-compatible provider has the cheapest egress?
- [The best sandbox providers for AI agents](https://toolweight.dev/best/best-sandbox-provider-for-ai-agents.md): What's the best sandbox for running AI-generated code?
- [The best SMS APIs for Australian startups](https://toolweight.dev/best/best-sms-api-for-australian-startups.md): Which SMS API should an Australian startup use?
- [The best Vercel alternatives for cheap bandwidth](https://toolweight.dev/best/best-vercel-alternative-for-cheap-bandwidth.md): Which host is cheapest for a bandwidth-heavy site?
- [The cheapest registrars for domain renewals](https://toolweight.dev/best/cheapest-domain-renewal.md): Which registrar has the cheapest domain renewals?

## Head-to-head

- [AWS S3 vs Cloudflare R2](https://toolweight.dev/vs/aws-s3-vs-cloudflare-r2.md)
- [Backblaze B2 vs Cloudflare R2](https://toolweight.dev/vs/backblaze-b2-vs-cloudflare-r2.md)
- [Browserbase vs Steel](https://toolweight.dev/vs/browserbase-vs-steel-dev.md)
- [Claude Code vs Cursor](https://toolweight.dev/vs/claude-code-vs-cursor.md)
- [ClickSend vs Twilio](https://toolweight.dev/vs/clicksend-vs-twilio.md)
- [Cloudflare Registrar vs Porkbun](https://toolweight.dev/vs/cloudflare-registrar-vs-porkbun.md)
- [Convex vs Supabase](https://toolweight.dev/vs/convex-vs-supabase.md)
- [E2B vs Modal](https://toolweight.dev/vs/e2b-vs-modal.md)
- [Firebase vs Supabase](https://toolweight.dev/vs/firebase-vs-supabase.md)
- [MySQL vs Postgres vs SQLite](https://toolweight.dev/vs/mysql-vs-postgresql-vs-sqlite.md)
- [Namecheap vs Porkbun](https://toolweight.dev/vs/namecheap-vs-porkbun.md)
- [Netlify vs Vercel](https://toolweight.dev/vs/netlify-vs-vercel.md)
- [Postmark vs Resend](https://toolweight.dev/vs/postmark-vs-resend.md)
- [Resend vs SendGrid](https://toolweight.dev/vs/resend-vs-sendgrid.md)

## Optional

- [Methodology](https://toolweight.dev/methodology.md): how values are gathered, dated and weighed
- [About](https://toolweight.dev/about.md)
- [Corrections](https://toolweight.dev/suggest): point at a source and we will fix it