GitDiagram Pricing

freeopen source · MITlast verified August 24, 2026official site ↗

At a glance

Free hosted web tool and open-source (MIT); bring your own OpenAI/OpenRouter API key.

Self-hosting cost

GitDiagram is open source under the MIT license. Self-hosting does not add a software license fee, but you still pay for infrastructure, operations, and any external model or API usage.

Free & cheaper Documentation & Knowledge

same category, free plan or open-source license

Claude CodeFree CLI tool ($0); model consumption billed via Anthropic API (Claude 3.5 Sonnet: $3/1M in, $15/1M out with prompt caching) or included in Claude Pro ($20/mo), Claude Max ($100-$200/mo), and Claude Team/Enterprise subscriptions. Also supports AWS Bedrock and GCP Vertex AI BYOK.Ghosttyopen sourceFree and open source under the MIT License (ghostty-org/ghostty, 59k+ GitHub stars). Non-profit project fiscally sponsored by Hack Club and led by Mitchell Hashimoto. Ultra-fast GPU-accelerated native terminal for macOS (Metal/Swift) and Linux (OpenGL/GTK4) with zero licensing costs ($0).Scalaropen sourceFreemium open-source OpenAPI documentation platform and interactive API client (MIT licensed core). Open-source core is 100% free to self-host with zero licensing fees. Scalar Cloud Free tier ($0/mo) includes hosted subdomains, standard API reference rendering, and built-in themes. Scalar Pro starts at $72/mo ($24/seat/mo with 3-seat minimum) adding custom domains, bidirectional Git Sync with automated PR previews, and MDX guides. Enterprise tier offers custom pricing for SSO/SAML, granular RBAC, and dedicated 99.99% SLAs.ObsidianFree local-first Markdown knowledge base for personal and commercial use (100% offline, zero vendor lock-in). Optional paid add-ons include Obsidian Sync ($4/mo billed annually or $5/mo monthly for end-to-end encrypted multi-device sync and 1-year version history), Obsidian Publish ($8/mo/site billed annually or $10/mo monthly for custom domain web publishing), Commercial Support License ($50/user/year), and Catalyst ($25 one-time early-access beta tier). 40% discount available for education and non-profits. Extensive ecosystem with 1,500+ community plugins and local AI integrations.

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FAQ

How much does GitDiagram cost?

Free hosted web tool and open-source (MIT); bring your own OpenAI/OpenRouter API key.

Does GitDiagram have a free plan?

Yes — GitDiagram is completely free.

Can you self-host GitDiagram for free?

GitDiagram is open source under the MIT license. Self-hosting does not add a software license fee, but you still pay for infrastructure, operations, and any external model or API usage.

What are free or cheaper GitDiagram alternatives?

Claude Code, Ghostty, Scalar are in the same category with a free plan or open-source license.

pricing is hand-verified editorial data (as of August 24, 2026) — vendors change plans; confirm on the official site before you buy. Reuse this data under CC-BY 4.0 via /data.