Cairn vs EVONX
Cairn
cairnflow.app
EVONX
evonx.aiSide by side
| Figure | Cairn | EVONX |
|---|---|---|
| Price from | Free | $20/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | — | Yes |
| macOS | Yes | — |
| Plans published | 2 | 4 |
| Spec score · User Flow Software | 9.0 (#3) | 8.2 (#8) |
| Intended users | The maker identifies founders and product managers, agencies and freelancers, and technical teams as intended users. | EVONX describes itself as built for production software teams evolving existing software, as well as teams starting a new application from a sentence. |
| Support | The maker provides a contact form for privacy matters and enquiries; no separate support tier is stated on the opened pages. | The pricing page lists community support for Starter and Plus, priority support for Pro, and dedicated support for Enterprise. |
| What it does | Cairn is a macOS desktop application for discovery wireframing that models product data, roles and flows, then runs those flows to find missing data before implementation. | EVONX is a multi-agent AI platform that evolves working software from plain-language feature, change, or fix requests. |
Plans
In their own words
Cairn
Cairn is a macOS desktop app for mapping screens, data, roles, and CRUD operations before building a product. Users sketch low-fidelity pages, modals, and sheets, then connect them into scenarios with triggers and dependencies across roles. Cairn checks whether data used on a screen was created earlier in its causal flow and flags missing data. Its Fields and Journeys views show where data appears and how each role moves through a flow. The app works offline and saves projects as portable.cairn files on the user's Mac. The maker says Cairn has no accounts or telemetry and does not upload project files; it connects to the internet for update checks and Pro license validation. Cairn is positioned as a complement to Figma for later visual design. The free plan costs nothing and includes one project and up to two scenarios, but does not allow file import or export. Real-time collaboration is not available, and Cairn is not intended for pixel-perfect or high-fidelity design.
EVONX
EVONX is a web-based multi-agent AI platform for changing existing software or starting an application from a plain-language request. It examines code and dependencies across frontend, backend, infrastructure, and data layers, then turns a feature, change, or fix into a technical plan. It applies the proposed code changes, tests them, and presents a running preview. Work takes place in isolated previews; changes become pull requests only after approval, and EVONX says it does not write directly to the main branch. It can coordinate work across multiple repositories while maintaining their contracts, and its documentation describes generating a working web app and API from a description. The integrations hub provides build-with guides for services including GitHub, PostgreSQL, Stripe, and OpenAI; these are not official partnerships. Customers supply credentials and keep operational ownership of external services. The free Starter plan includes 500 credits per month. Plus costs $20 a month, Pro costs $99 a month, and Enterprise has custom pricing. Heavier models and longer tasks use more credits.