Fraud-detection system that scores a payment as risky or safe while it's happening — checking the device, behavior and identity behind it — instead of catching fraud only after the money's already gone.
sardine.ai
Alternatives to
Unit21
Best alternatives to Unit21 in 2026
Catching fraud or money laundering is only half the job at a bank or fintech — once something's flagged, a risk team still has to investigate it, decide what to do, and often file a formal report with a regulator, all within strict compliance timelines. Unit21 is built for that whole operational chain: it lets a risk team write their own detection rules without needing an engineer, then gives them the tools to investigate a flagged case and generate the regulatory filing, in one connected system rather than several disconnected tools. Unit21 combines AI agents for real-time fraud detection and automated investigation with a no-code rule builder, a unified device-risk score, transaction monitoring, payment and sanctions screening, case management, automated regulatory filing (SARs, STRs, CTRs), graph analysis for uncovering hidden relationships between entities, and access to a fraud-data consortium covering 80M+ US adults. It reports representing roughly 5% of all Suspicious Activity Reports (SARs) filed in the US, monitoring 4.5 billion events monthly across 200+ institutional customers.
Quick comparison of Unit21 alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Banks | Fintechs | Payment processors | Merchants processing high-risk transactions | — | |
| 2 | Développeurs et équipes utilisant Claude Desktop ou Cursor avec des serveurs MCP tiers, soucieux de la sécurité des appels d'outils IA | — | |
| 3 | Site owners and developers managing AI crawler access | — | |
| 4 | Privacy-conscious users wanting model-agnostic AI access from their browser | — | |
| 5 | Developers wanting privacy/consent management integrated into their codebase | — | |
| 6 | IT/DevOps teams replacing corporate VPNs with Zero Trust access | — | |
| 7 | Businesses needing GDPR-compliant, frictionless bot protection | — | |
| 8 | Organisations d'ingénierie, équipes sécurité/conformité adoptant des agents de code IA | — | |
| 9 | Équipes MCP/API et sécurité déployant des agents IA | — | |
| 10 | Équipes DevOps/SRE et administrateurs système voulant un moniteur d'expiration de certificat sans dépendance pour cron/CI | — | |
| 11 | Équipes construisant des applications LLM soumises à des exigences de conformité (RGPD, AI Act) et de protection des données | — | |
| 12 | Développeurs et petites équipes voulant committer des secrets chiffrés dans Git sans gestionnaire cloud | — |
#1
- ✓ Real-time fraud scoring during the transaction, across many payment rails
- ✓ Fraud-intelligence consortium creates a genuine cross-customer network effect
#2
macOS app that intercepts and audits MCP server traffic between Claude Desktop or Cursor and connected tools for security oversight.
mcpsnitch.ai
- ✓ Purpose-built for MCP, not a repurposed generic tool
- ✓ Free, open-source option under GPL-3.0
#3
Free, in-browser generator for robots.txt and llms.txt files that control which AI crawlers can access your site.
openrobots.vercel.app
- ✓ 100% client-side — no account, no data leaves your browser
- ✓ Covers 82+ named AI crawlers with sensible presets
#4
Privacy-first browser side panel AI assistant that works with any model or agent and anonymizes sensitive data before it leaves your browser.
chatpanel.net
- ✓ Works with any AI model or agent — in-browser, local, cloud API, or coding agents like Claude Code/Copilot
- ✓ Anonymizes sensitive data (emails, phone numbers, card numbers) before it leaves your browser, restores it in the reply
#5
Open-source, developer-first privacy and cookie-consent infrastructure with headless consent flows and version-controlled policies.
policystack.dev
- ✓ Fully open-source (Apache-2.0) with a public commitment to never relicense or paywall features
- ✓ Lightweight headless consent engine (under 4kb core)
#6
Open-source WireGuard-based mesh VPN that replaces traditional VPNs with Zero Trust, identity-based device access.
netbird.io
- ✓ Open-source (BSD-3-Clause + AGPLv3) with 28.9k GitHub stars and active development
- ✓ WireGuard-based peer-to-peer mesh is faster and simpler than routing through a central VPN gateway
#7
Invisible, privacy-first bot protection using proof-of-work instead of visual puzzles.
friendlycaptcha.com
- ✓ Invisible — no puzzles, no user friction
- ✓ GDPR-compliant by design, zero personal data collected
#8
Enterprise policy-enforcement layer that watches what coding agents do — prompts, commands, file changes — and blocks or alerts on sensitive data exposure.
oconeeruntime.com
- ✓ Visibilité temps réel sur les actions des agents IA
- ✓ Détection/blocage de données sensibles et credentials
#9
Authorization layer that checks every AI agent action against a policy before it runs, with per-action revocation and a full audit trail.
keydris.com
- ✓ Vérification par action, pas seulement par clé API
- ✓ Révocation ciblée sans tuer tout le processus
#10
A free Python command-line tool that checks a website's HTTPS certificate and tells you exactly what's wrong with it — expired, untrusted, wrong hostname — instead of a generic connection error.
github.com
- ✓ Zero dependencies, easy to drop into bare servers or containers
- ✓ Detailed diagnostics rather than a generic 'connection failed'
#11
An open-source trust-boundary gateway that sits in front of OpenAI, Anthropic and Gemini API traffic to redact PII, enforce rate limits, and track usage without touching your app code.
github.com
- ✓ Single gateway covering OpenAI, Anthropic and Gemini without SDK changes
- ✓ Comprehensive PII detection and redaction
#12
A free command-line tool that encrypts your .env secrets file so you can safely commit it to Git, with a pre-commit hook that catches accidental leaks before they happen.
github.com
- ✓ Genuinely zero-config: one command sets up encryption plus a pre-commit safety net
- ✓ No external dependencies or cloud service required
FAQ about Unit21 alternatives
- What is the best alternative to Unit21 in 2026?
- Based on our selection, Sardine is the best alternative to Unit21 in 2026. Fraud-detection system that scores a payment as risky or safe while it's happening — checking the device, behavior and identity behind it — instead of catching fraud only after the money's already gone.. See our full ranking above to compare all options.
- Is Unit21 free?
- Unit21 is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Unit21 are there?
- mySelectas has listed 12 alternatives to Unit21 in the Security & Privacy category. Our selection is updated regularly to include the best options available.