Sphinx
Sphinx: An open-source deployment workflow for Foundry teams coordinating approvals across networks. Ranked #11 of 16 in Smart Contracts Software by our editors (7.6/10); pricing: Free plan; best for foundry teams coordinating multi-network deployments.
At a glance
- Editor score7.6 / 10
- PricingFree plan
- Best forFoundry teams coordinating multi-network deployments
- Free planYes
- Paid fromFree
- Chain coverageMulti-chain
- Facts checked24 Sep 2026
Where it wins
- Propose deployments from the command line or CI and route them for approval
- Gnosis Safe owner approvals and execution across multiple networks
- Stores deployment artifacts and automatically verifies contracts on explorers
Where it doesn't
- Focused on deployment, not the broader smart-contract authoring and testing workflow
- Requires self-hosting the Sphinx Platform
- Live platform deployments are billed in fiat after completion
Our verdict on Sphinx
Sphinx is an open-source deployment tool for teams building Solidity smart contracts with Foundry. It is aimed at developers who need a coordinated path from deployment proposal through owner approval to execution across multiple networks. Proposals can come from a command line or CI process, and Gnosis Safe owners approve them in the Sphinx UI. That makes it suited to teams that want deployment steps to include an approval gate rather than treating release as an individual command. Its focus is deployment coordination, not a full authoring or testing environment.
The workflow connects to existing Forge scripts and supports multi-network execution after approval. Sphinx also stores deployment artifacts for later retrieval and automatically verifies contracts on block explorers. Those features make it relevant when teams need to retain deployment outputs and handle verification as part of shipping. The project describes deployments as gasless and says testnet deployments are free. However, the Sphinx Platform must be self-hosted, so teams should account for operating that platform themselves. The repository also says live platform deployments are billed in fiat after completion; buyers should check the applicable cost before relying on it for production releases.
Sphinx is a strong fit for small, mid-market, or enterprise teams already using Foundry and Gnosis Safe that need approvals across networks, with Linux and self-hosted platform support. Community is the listed support channel, so organizations that require a formal support arrangement should weigh that fit carefully. Teams seeking security analysis, a visual builder, or broader contract authoring and testing capabilities should look elsewhere or pair Sphinx with other tools. Choose it for the approval-and-deployment layer, not as an all-in-one smart-contract development suite.
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Sphinx pricing
Sphinx fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Chain coverage | Multi-chain |
| Contract languages | Solidity |
| Deployment targets | Both |
| Security analysis | No |
| Visual contract builder | No |
| API or SDK access | Not verified |
| Contract templates | Not verified |
| Deployment | Self-hosted, Cloud |
| Platforms | Linux |
| Support | Community |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 2 integrations: Foundry, Gnosis Safe |
| Pricing | Free plan |
| Website | sphinx.dev |
| Facts checked | 24 Sep 2026 |
Sphinx integrations
Sphinx lists 2 integrations on its own site.
- Foundry
- Gnosis Safe
Alternatives to Sphinx
- Remix IDEA free contract IDE covering authoring, testing, analysis, debugging, deployment, and verification.9.2
- FoundryA free, open-source toolchain for building, testing, debugging and deploying contracts.8.9
- HardhatAn open-source, plugin-based Solidity toolkit for teams comfortable working from a local project.8.8
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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