Alternatives
10 best GTK+ alternatives
Tools that cover the same task as GTK+ (ui toolkit), ranked by how completely their pricing, free tier and API access are documented. Checked Oct 4, 2026.
- GTK+ starts at
- Not listed
- Free plan
- Free plan
- API
- API unknown
- 01
Tiptap Editor 3.0 Beta
Tiptap is a headless rich-text editor framework with 100+ extensions and a paid Tiptap Platform for collaboration, comments, DOCX conversion, AI toolkit agents, and cloud documents. Developers embed the open-source editor or buy hosted platform tiers for production document apps.
Best for: Product teams building Notion-like, legal, or AI-native editors who need extensible React components plus optional hosted collaboration.
- 02
AppVeyor
AppVeyor is a hosted CI/CD service for Windows, Linux, and macOS that connects to source control and runs builds on cloud VMs with admin access. It supports multi-stage deployments, self-hosted build agents, and parallel jobs for teams shipping cross-platform software.
Best for: Developers and release teams that need Windows-friendly CI/CD alongside Linux and macOS build agents.
- 03
Mem0
Mem0 provides persistent memory infrastructure for AI agents and applications so context survives across sessions, users, and agents. The platform offers hosted plans with SDK integration plus open-source options for developers building production agents that need durable recall.
Best for: Agent builders and app teams that need hosted memory layers with defined add and retrieval quotas.
- 04
Editor.do
Editor.do combines a browser code editor, visual page builder, AI assistant, and static site hosting with free SSL and custom domains. It targets fast deployment of static sites and supports many languages plus thousands of installable templates.
Best for: Developers and makers who want to code, preview, and host static sites from the browser.
- 05
ToolJet
ToolJet is an open-source, AI-native low-code platform for internal tools and business apps on ToolJet Cloud or self-hosted Docker/Kubernetes. Builders use a visual editor, AI canvas credits, or coding-agent plugins to connect databases and SaaS APIs, with cloud plans priced per builder seat and a free tier plus AGPL Community Edition for self-hosters.
Best for: Engineering and ops teams building internal dashboards, admin panels, and AI-assisted workflows with governance requirements.
- 06
CodeConverter
Users can start on a free daily quota or upgrade to unlimited conversions.
Best for: Developers who need quick cross-language translations without setting up local transpilers.
- 07
FACEIO
FACEIO is a passwordless facial authentication SDK for websites and apps, combining face recognition, liveness detection, and age verification through a browser widget and REST API. Developers enroll users once and authenticate them with face scans instead of passwords.
Best for: Web developers who need cross-browser face login, liveness checks, or age gates without building biometrics in-house.
- 08
codenameone.com
Codename One compiles Java source into native mobile, desktop, web, watch, TV, and vehicle apps while shipping a custom UI toolkit with the app. The open-source framework is royalty-free, with paid cloud-build and production services for iOS builds, push, crash protection, and store submission.
Best for: Java teams targeting multi-platform native apps who want cloud iOS builds without owning Mac hardware.
- 09
Medplum
Medplum is an open-source healthcare developer platform for building and running modern clinical apps on FHIR-native infrastructure. It offers hosted cloud tiers and self-hosted options with bots, integrations, authentication, and compliance features aimed at digital health teams shipping production patient-facing software.
Best for: Healthcare engineering teams building FHIR-based apps who need an open-core platform with hosted or self-managed deployment paths.
- 10
Better Auth
Better Auth is a TypeScript authentication framework that lives in your application code with plugins for sessions, social login, organizations, passkeys, API keys, and enterprise SSO. The vendor also sells managed infrastructure with dashboards, audit logs, and security detections while the core framework stays open source.
Best for: Developers building Next.js, Nuxt, SvelteKit, Hono, and other TypeScript apps who want composable auth in code plus optional hosted infrastructure.
GTK+ alternatives: common questions
What is the best free alternative to GTK+?
AppVeyor has an ongoing free plan. Pricing lists an Open-source plan at FREE with unlimited public projects and one concurrent job. Free plans change, so check the vendor before relying on one.
What is the cheapest GTK+ alternative?
Editor.do has the lowest listed starting price at $4/mo.
Which GTK+ alternatives have an API?
Tiptap Editor 3.0 Beta, AppVeyor, Mem0, ToolJet, FACEIO mention API or developer access.