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Karni vs SaaS Pegasus

SaaS Pegasus is a commercial Django boilerplate: it generates a codebase with the technologies and SaaS features you choose, and you own and extend that code. Karni is an open-source framework you install and upgrade: a project declares models and access rules, and the API, admin, permissions and React screens are derived from them. Facts about SaaS Pegasus were checked against its website and documentation on 2026-10-21 (sources).

What both do

Both start a Django project with authentication, a REST API documented with drf-spectacular, Celery, Docker and a modern front-end build. Both ship guidance for AI coding agents (rule files and agent instructions) and both have a documented way to bring a new release into an existing project.

Where SaaS Pegasus is the better choice

  • SaaS features. Pegasus ships Stripe subscriptions, teams and multi-tenancy, AI chat and agents, one-click deploys and Wagtail. Karni has a payments module (Stripe and Razorpay checkout) but no subscriptions, teams or multi-tenancy.
  • Maturity and support. Pegasus has been sold since 2019, states that 1,910 developers and businesses use it, releases about monthly and offers email and Slack support. Karni's first release was in October 2026, with no known production deployment and no commercial support.
  • Front-end choice. Pegasus offers HTMX or React (and a Vue example) with several CSS frameworks. Karni supports React only.
  • Newer Django. Pegasus's open-source edition targets Django 6 on Python 3.14, while Karni 0.4 supports Django 5.2 LTS on Python 3.12 to 3.14.

Where Karni is the better choice

  • Licence and price. Karni is free and Apache-2.0 licensed. Pegasus's paid tiers are a one-time $449 (one project) or $649 (unlimited projects), each with one year of updates, under a licence that does not allow redistributing the code (an MIT-licensed open-source edition covers a smaller feature set).
  • How upgrades work. Pegasus upgrades by regenerating code into your repository and merging it with git, resolving conflicts by hand. Karni keeps the generic code in versioned packages, and karni upgrade applies code changes with codemods and lists what it could not change (stability promise).
  • Per-model code. In a Pegasus project the generated code is yours to maintain. In Karni a resource is its model and its access rule, and the serializer, viewset, admin, permissions and React screens are derived from them (the API).
  • Agent enforcement. Beyond rule files, Karni's lint rules and karni check fail a build when an agent hand-writes a table, form or HTTP call that Karni provides (enforcement).

Who should pick which

Pick SaaS Pegasus to launch a subscription SaaS soon, with billing, teams and support included, and a team happy to own the generated code. Pick Karni for an internal tool, line-of-business application or product where most screens are permissioned CRUD, where the team wants the generic code kept upstream, and where a young, unsupported framework is an acceptable risk.

Side by side

SaaS Pegasus Karni
What you get a generated codebase you own a dependency you upgrade, plus a scaffold
Price and licence $449 / $649 one-time (1 year of updates), or the MIT open-source edition free, Apache-2.0
In market since 2019, 1,910 customers stated October 2026
Subscriptions, teams, multi-tenancy yes no (payments module only)
Front end HTMX or React (Vue example) React only
Upgrading regenerate and merge with git karni upgrade with codemods
Per-model API, admin, permissions generated once, then yours derived from the model and access rule
AI agent support rule files, CLAUDE.md / AGENTS.md, skills, MCP instruction files for eight tools, MCP server, build-failing lint rules
Support email, Slack (paid tiers) GitHub issues
Django version 6 (open-source edition) 5.2 LTS

Sources