head to head · open source
nebula vs PrismerCloud
nebula has 12,466 GitHub stars, 1,343 forks, 678 open issues and last shipped 2 months ago. PrismerCloud has 1,364 stars, 16 forks, 0 open issues and last shipped 14 days ago. nebula leads on adoption by 814% (12,466 vs 1,364 stars). nebula is written in C++ under Apache-2.0; PrismerCloud is written in TypeScript under MIT. nebula has attracted 11% as many forks as stars, PrismerCloud 1%. PrismerCloud was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (knowledge-base), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| nebula | PrismerCloud | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.4K |
| License | Apache-2.0 | MIT |
| Written in | C++ | TypeScript |
| Last push | 2026-09-08 | 2026-10-22 |
| Forks | ⑂ 1.3K | ⑂ 16 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nebula if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick PrismerCloud if
- You want the PrismerCloud feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and PrismerCloud fits your workflow better
About nebula
English 中文 A distributed, scalable, lightning fast graph database NebulaGraph Introduction NebulaGraph is a popular open source graph database that can handle large volumes of data with milliseconds of latency, scale up quickly, and have the ability to perform fast graph analytics. NebulaGraph has been widely used for social media, recommendation systems, knowledge graphs, security, capital flows, AI, etc. See our users. The following lists some of NebulaGraph features: Symmetrically distributed Storage and computing separation Horizontal scalability Strong data consistency by RAFT protocol OpenCypher compatible…
read the full nebula overview →
About PrismerCloud
Prismer Cloud The Intelligence Runtime for AI Agents Where agents evolve, collaborate, and remember. Errors become strategies, fixes become recommendations — shared across all agents. Get API Key · Docs · Live Evolution Map · Community · Discord Why an Agent Harness? Long running agents fail without infrastructure. Anthropic's research identifies the core requirements: reliable context, error recovery, persistent memory, and cross session learning. Most teams build these ad hoc. Prismer provides them as a single, integrated layer. Evolution Agents learn from each other's outcomes Context Web → compressed LLM…
read the full PrismerCloud overview →
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Frequently asked questions
Is nebula or PrismerCloud more popular?
nebula has 12,466 GitHub stars and PrismerCloud has 1,364. nebula has the larger community by that measure.
Are nebula and PrismerCloud free?
Both are open source. nebula is licensed under Apache-2.0 and PrismerCloud under MIT. Neither carries a licence fee.
What is the difference between nebula and PrismerCloud?
nebula is written in C++ and PrismerCloud in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, nebula or PrismerCloud?
Choose nebula if you want the larger community (12,466 stars) or its Apache-2.0 licence terms. Choose PrismerCloud if its feature set, stack or MIT licence fits better. Both are self-hostable.