Compare cores
Up to four cores side by side: maturity, license, tests and activity.
| Attribute | ultraembedded riscv | Ibex | VexiiRiscv | NEORV32 |
|---|---|---|---|---|
| Maturity | M2 · Simulation-tested | M2 · Simulation-tested | M2 · Simulation-tested | M4 · Production-ready |
| License | BSD-3-Clause · Commercial-friendly | Apache-2.0 · Commercial-friendly | MIT · Commercial-friendly | BSD-3-Clause · Commercial-friendly |
| Language | — | SystemVerilog | SpinalHDL (Scala) | VHDL |
| Tests | yes | yes | yes | yes |
| CI | — | yes | yes | yes |
| Formal | — | yes | — | — |
| FuseSoC | — | yes | — | — |
| Activity | updated 5 years ago | updated 1 day ago | updated 1 day ago | updated 3 days ago |
| Boards | — | — | — | — |
| Interfaces | — | — | AXI4, Wishbone, Tilelink, AXI4, Wishbone, Tilelink | — |
| Category | CPUs and compute | CPUs and compute | CPUs and compute | CPUs and compute |