Login screens, password resets, and "sign in with Google" buttons are the boring part of every app — MonoCloud is a drop-in service that handles all of it so you don't build your own login system from scratch.
monocloud.com
Alternatives to
Kastra
Best alternatives to Kastra in 2026
Letting an AI agent run shell commands, hit APIs, or query a database on its own is powerful and a little terrifying — one bad instruction and it can do real damage before anyone notices. Kastra is built to close that gap: it sits between the agent and the outside world, checking every action against a policy in under a millisecond, and can revoke access instantly if something looks wrong. Kastra is a runtime authorization layer for agents built on Claude, Cursor, Codex and OpenClaw, providing policy decision points, signed append-only audit trails, and both cloud and self-hosted (including air-gapped) deployment. It supports SDKs across TypeScript, Python, Go, Rust, Java and Swift, and controls shell commands, API requests, database queries and browser actions specifically — not just a generic firewall. It's SOC 2 Type II, ISO 27001, HIPAA and GDPR compliant, aimed squarely at teams running agents in regulated or production environments.
Quick comparison of Kastra alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Développeurs qui veulent déléguer l'authentification plutôt que la construire eux-mêmes | — | |
| 2 | Enterprise, finance, legal and government/defense organizations concerned about deepfake fraud in meetings | — | |
| 3 | AppSec engineers | DevOps teams | Open-source maintainers | — | |
| 4 | Startups pursuing their first compliance audit, growth-stage companies, enterprises managing multi-framework compliance | — | |
| 5 | Enterprise security teams, CISOs, Fortune 500 companies, high-growth companies | — | |
| 6 | Privacy, legal and security teams at organizations managing multiple privacy regulations (GDPR, CCPA, Colorado CPA, Virginia VCDPA) | — | |
| 7 | Startups to enterprises needing SOC 2, ISO 27001, GDPR, HIPAA and similar compliance | — | |
| 8 | Startups to enterprises managing compliance requirements and third-party vendor risk | — | |
| 9 | Fintechs | Digital banks | Payment processors | Crypto platforms | Sponsor banks | — | |
| 10 | Banks | Fintechs | Payment processors | Merchants processing high-risk transactions | — | |
| 11 | IT & security teams | Enterprise organizations | Compliance/SOX teams | — | |
| 12 | Marketplaces | News & media platforms | Dating apps | Multi-country platforms | — |
#1
- ✓ Free tier généreux (50K MAU)
- ✓ SDK bien documentés avec quickstarts
#2
A security tool that joins your video calls as a silent watchdog, flagging deepfake voices, AI-generated impersonators and leaked sensitive data in real time.
polygraf.ai
- ✓ Real-time deepfake/impersonation detection inside live meetings
- ✓ On-premise deployment for regulated/sensitive environments
#3
Free secrets scanner from Gitleaks' original creator: finds leaked API keys and passwords in code with far fewer false positives.
github.com
- ✓ Built by Gitleaks' original creator with direct insight into its weaknesses
- ✓ Drop-in replacement — existing Gitleaks configs work unchanged
#4
A service that gets a software company ready for its first security certification (like SOC 2) and keeps it that way automatically, instead of a founder spending months chasing screenshots for an auditor.
scytale.ai
- ✓ Wide framework coverage (80+, including SOC 2, ISO 27001, HIPAA)
- ✓ AI-drafted security questionnaire answers save real time
#5
A security tool that keeps track of every AI agent, app and 'non-human' account quietly operating inside a company's software — and flags the ones nobody's watching before they cause a breach.
reco.ai
- ✓ Focused specifically on AI agent and non-human identity risk
- ✓ Large library of pre-built detection controls
#6
Software that automates the paperwork of privacy law — like GDPR requests to delete someone's data — across every tool your company uses, instead of your legal team chasing each app by hand.
datagrail.io
- ✓ 1,500+ pre-built integrations — much broader than most rivals
- ✓ Automates DSR fulfillment across connected apps
#7
Tool that automatically checks whether a company's actual systems meet security certification requirements (like SOC 2), instead of someone manually screenshotting settings for an auditor once a year.
vanta.com
- ✓ Independently ranked as a Forrester Wave Leader in GRC Platforms
- ✓ 400+ integrations for continuous automated compliance monitoring
#8
Compliance automation tool that continuously watches a company's real systems and pulls the evidence a security auditor needs automatically, instead of a team assembling it by hand before every audit.
drata.com
- ✓ Continuous automated evidence collection across multiple frameworks
- ✓ Forward-looking agent-governance feature for monitoring AI agents
#9
No-code platform that lets a bank or fintech's risk team build their own fraud and money-laundering detection rules, investigate flagged cases, and file the required regulatory reports.
unit21.ai
- ✓ No-code rule builder lets risk teams adjust fraud/AML logic without engineering
- ✓ Reports ~5% of all US SARs filed, a strong real-usage indicator
#10
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
- ✓ Real-time fraud scoring during the transaction, across many payment rails
- ✓ Fraud-intelligence consortium creates a genuine cross-customer network effect
#11
Identity governance platform that discovers, manages and secures every human and non-human identity (including AI agents) across a company's SaaS and cloud apps.
zluri.com
- ✓ Covers non-human identities (service accounts, AI agents) — an emerging blind spot
- ✓ Automated access reviews for compliance frameworks
#12
Language-agnostic AI content moderation platform that filters abusive content, fraud and spam in real time across virtually any language or dialect.
utopiaanalytics.com
- ✓ Language-agnostic — works across any language/dialect, not just English
- ✓ Learns from a platform's own moderator decisions over time
FAQ about Kastra alternatives
- What is the best alternative to Kastra in 2026?
- Based on our selection, MonoCloud is the best alternative to Kastra in 2026. Login screens, password resets, and "sign in with Google" buttons are the boring part of every app — MonoCloud is a drop-in service that handles all of it so you don't build your own login system from scratch.. See our full ranking above to compare all options.
- Is Kastra free?
- Kastra is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Kastra are there?
- mySelectas has listed 12 alternatives to Kastra in the Security & Privacy category. Our selection is updated regularly to include the best options available.