Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Smart Contracts Software

Circle Contracts vs Slither

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Circle Contracts #6 in Smart Contracts Software 8.3/10 Free plan Free plan✓ 3 of 4 features Try Circle Contracts
Slither #8 in Smart Contracts Software 7.9/10 Free plan Free plan✓ 2 of 4 features Visit Slither

Circle Contracts leads on 2 checks, Slither on 0, and 3 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCircle Contracts · 8.3/10
  • Free planboth
  • Most featuresCircle Contracts · 3 of 4

Circle Contracts scores higher on our rubric for smart contracts software: 8.3 against 7.9 out of 10; our editors rank them #6 and #8.

On chain coverage, Circle Contracts gives you Multi-chain where Slither offers Single-chain. Circle Contracts offers visual contract builder; Slither doesn't. Circle Contracts offers contract templates; Slither doesn't.

Circle Contracts is the better fit for teams deploying templated contracts with APIs or a console. Slither is the better fit for teams adding Solidity and Vyper analysis to CI.

  • Circle Contracts fits best

    Teams deploying templated contracts with APIs or a console

  • Slither fits best

    Teams adding Solidity and Vyper analysis to CI

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Circle Contracts 8.3/10 Visit ↗ Slither 7.9/10 Visit ↗
At a glance
Editor score 8.3 7.9
Ranking #6 in Smart Contracts Software #8 in Smart Contracts Software
Best for Teams deploying templated contracts with APIs or a console Teams adding Solidity and Vyper analysis to CI
Pricing model Free plan + paid Free
Starting price $0.00025/unit usage-based Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Self-hosted
Platforms Web Linux, macOS, Windows
Support Docs Community, Docs
Integrations 4 integrations 6 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Circle Contracts 3/4 · Slither 2/4
Security analysis Not checked yet ✓ (best)
Visual contract builder ✓ (best) —
API or SDK access ✓ ✓
Contract templates ✓ (best) —
Specs
Chain coverage Multi-chain Single-chain
Contract languages Multiple Multiple
Deployment targets Both Not checked yet
Our review
Pros
  • Audited low-code templates cover ERC-20, ERC-721, and ERC-1155 contracts
  • Console and APIs support deployment, interaction, and contract management
  • Event monitoring, webhooks, and monthly free usage support ongoing operations
  • Detects vulnerabilities and points to related source-code locations
  • Supports custom Python analyses through its detector API
  • Integrates with CI, Hardhat, and Foundry builds
Cons
  • Circle Wallets are required for deployment and transactions
  • Usage fees apply to mainnet contract calls after the free allowance
  • Its focus is narrower than full smart-contract development environments
  • Focuses on security analysis, not end-to-end contract development
  • Does not include a visual builder or contract templates
  • Support is through community resources and documentation
Our verdict

Circle Contracts gives businesses and developers a console and API for deploying, viewing, interacting with, and managing smart contracts. Its customizable, security-audited low-code templates cover ERC-20, ERC-721, and ERC-1155 token use…

Read the review →

Slither is a Python-based static analysis framework for Solidity and Vyper smart contracts. It is aimed at developers and teams who want to identify vulnerabilities and error conditions in contract code, inspect contract information, or…

Read the review →
  1. Circle ContractsSmart Contracts Software 8.3Free plan
  2. SlitherSmart Contracts Software 7.9Free plan

Strengths and trade-offs

  • Circle Contracts — where it wins

    • Audited low-code templates cover ERC-20, ERC-721, and ERC-1155 contracts
    • Console and APIs support deployment, interaction, and contract management
    • Event monitoring, webhooks, and monthly free usage support ongoing operations

    Where it doesn't

    • Circle Wallets are required for deployment and transactions
    • Usage fees apply to mainnet contract calls after the free allowance
    • Its focus is narrower than full smart-contract development environments

  • Slither — where it wins

    • Detects vulnerabilities and points to related source-code locations
    • Supports custom Python analyses through its detector API
    • Integrates with CI, Hardhat, and Foundry builds

    Where it doesn't

    • Focuses on security analysis, not end-to-end contract development
    • Does not include a visual builder or contract templates
    • Support is through community resources and documentation

More comparisons

All smart contracts software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update