Alternatives
Products that do what Kalleo does
Spaced repetition flashcards for cloud certifications
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2021 · cloudbite.attejuvonen.fi
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Certo is open-source infrastructure for issuing, managing, verifying, and exchanging digital credentials. It implements Open Badges 3.0[1] and W3C Verifiable Credentials[2] which are the open standards that make credentials portable, machine-verifiable, and vendor-independent. It is designed to be: - Self-hosted: run it inside your own infrastructure, air-gapped network, or sovereign cloud - Standards-compliant: credentials it issues work with any OB3/VC-compatible system - API-first: everything the UI can do, the API can do - Exportable: your data is always yours, in open formats -…
Aug 2026 · github.com
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I built a platform where you solve tasks together with AI agents (Claude Code, Codex, Cursor — any agent via SSH). Isolated sandbox environments, automated test scoring, global leaderboard. Tasks range from easy (AI one-shots it) to hard (requires human help). Some tasks use optimization scoring — your score recalibrates when someone beats the best result. Built it in 6 days as a solo founder. 100% of code written with Claude Code and Codex. Stack: Go, Next.js, K8s, Supabase, Stripe.
Mar 2026 · kagento.io
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Open Source Platform for nailing your next certification.
Apr 2026 · education.ditectrev.com
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