Free Security tiers
45 free tiers, safest first. Each one shows the limits, whether it needs a card, and how fresh the data is.
Free tierWhat you get freeRiskCardFreshness
Let's Encrypt · Security
50 certificates per registered domain per week · 5 duplicate certificates (same identifiers) per week · 90-day certificate validity
Billing risk: None
No card
✓ 28 Sep 2026
GitGuardian · Security
Up to 25 developers · Unlimited real-time secret scanning · Up to 500 historical scan detections
Billing risk: None
No card
✓ 28 Sep 2026
Snyk · Security
5 projects · Snyk Code (SAST): 100 tests/month · Snyk Open Source (SCA): 200 tests
Billing risk: None
No card
✓ 2 Oct 2026
Cloudflare · Security
Up to 20 widgets per account · Works without other Cloudflare services
Billing risk: None
No card
✓ 1 Oct 2026
Mozilla · Security
Free to scan any domain · Scan history is public · Free v2 API for scans
Billing risk: None
No card
✓ 28 Sep 2026
Proton · Security
Unlimited passwords, notes, and credit cards · Up to 10 hide-my-email aliases · Unlimited devices (browser, mobile, desktop)
Billing risk: None
No card
✓ 28 Sep 2026
SimpleLogin · Security
10 active aliases · 1 mailbox · Unlimited bandwidth, sends, and replies
Billing risk: None
No card
✓ 28 Sep 2026
JWT.io · Security
No usage limits · No authentication required · No API access
Billing risk: None
No card
✓ 28 Sep 2026
Semgrep · Security
Up to 10 contributors · Semgrep Code and Supply Chain included · Cross-file analysis with Pro rules
Billing risk: None
No card
✓ 1 Oct 2026
addy.io · Security
Unlimited standard aliases · 10 active shared-domain aliases · 2 shared alias domains
Billing risk: None
No card
✓ 28 Sep 2026
Aikido · Security
10 repos (fair-usage) · 2 container images · 10 AI AutoFixes/month
Billing risk: None
No card
✓ 28 Sep 2026
Aionda · Security
Up to 25 disposable addresses · Calendar and contacts included
Billing risk: None
No card
✓ 28 Sep 2026
Cerbos · Security
Up to 100 monthly active principals · 1 workspace, 2 developers · 2 Playgrounds, 2 simultaneous PDPs
Billing risk: None
No card
✓ 28 Sep 2026
FraudLabs Pro · Security
500 queries/month · 5 validation rules · 50 custom blacklists
Billing risk: None
No card
✓ 28 Sep 2026
Infisical · Security
5 identities · Unlimited projects · 3 environments per project
Billing risk: None
No card
✓ 28 Sep 2026
Internet.nl · Security
No account required for single tests · Batch API and dashboard by application only, not self-serve · Batch fair use: 2 requests/week, 5,000 domains each
Billing risk: None
No card
✓ 30 Sep 2026
Keybase · Security
250 GB encrypted file storage per user · Encrypted chat and teams · Public signed folders
Billing risk: None
No card
✓ 1 Oct 2026
Lockitbot · Security
Up to 2 resources · Unlimited members and users
Billing risk: None
No card
✓ 28 Sep 2026
ManageEngine · Security
30-day free trial · No credit card required · Paid plans start at 50 GB search storage
Billing risk: None
No card
✓ 28 Sep 2026
Permit.io · Security
1,000 monthly active users (MAU) · 20 tenants, 25 roles, 3 environments · Unlimited authorization queries, projects, and PDP instances
Billing risk: None
No card
✓ 28 Sep 2026
Roundsphere · Security
No registration required · Test messages are deleted a few hours after they arrive
Billing risk: None
No card
✓ 28 Sep 2026
Safety · Security
Single codebase, single user · 100 scans/month · Project-specific security policies
Billing risk: None
No card
✓ 28 Sep 2026
Socket · Security
Unlimited developers and repositories · 1,000 scans/month · 500 API requests/hour
Billing risk: None
No card
✓ 28 Sep 2026
TestTLS.com · Security
Free scan by domain name or IP address · Covers HTTPS and STARTTLS connections
Billing risk: None
No card
✓ 28 Sep 2026
Verifalia · Security
25 validations/day · API access · Bulk and real-time modes
Billing risk: None
No card
✓ 28 Sep 2026
Virgil Security · Security
Up to 250 registered users · Unlimited secure communication and group chat · Unlimited registered user devices
Billing risk: None
No card
✓ 28 Sep 2026
TempMailDetector.com · Security
200 lookups/month · No card required to start
Billing risk: None
No card
✓ 28 Sep 2026
Bitwarden · Security
Unlimited secrets · Up to 2 users · Up to 3 machine accounts
Billing risk: None
No card
✓ 1 Oct 2026
anon.li · Security
10 random aliases · 1 custom alias · Forwarding and tracking pixel removal
Billing risk: None
No card
✓ 28 Sep 2026
Antideo · Security
10 requests/hour · Email, IP, and phone validation included · HTTPS access
Billing risk: None
No card
✓ 28 Sep 2026
CertKit · Security
2 certificates, 1 agent, 1 seat (Homelab plan) · 3 domain SSL monitors · 90-day free trial of paid plans, no credit card required
Billing risk: None
No card
✓ 28 Sep 2026
Meterian.io · Security
Unlimited open source projects · 1 closed-source project · 10 analyses/day
Billing risk: None
No card
✓ 28 Sep 2026
Zenable · Security
5,000 Zenable Credits/seat/week · 10-25 credits per AI-reviewed file · Deterministic guardrails do not use credits
Billing risk: None
No card
✓ 28 Sep 2026
Smart Grow · Security
1 organization, 3 apps, 2 environments per app · 50 variables per environment, 2 secure files · 2 API keys
Billing risk: None
No card
✓ 28 Sep 2026
SSL Labs · Security
Public internet servers only · No signup or fee
Billing risk: None
No card
✓ 28 Sep 2026
Doppler · Security
Free for 3 users · 5 config syncs · 5 webhooks
Billing risk: Low
No card
✓ 28 Sep 2026
Sucuri · Security
Free remote scan of public websites · Sees only what is visible in the browser, not server-side files
Billing risk: None
No card
✓ 28 Sep 2026
Zoho · Security
1 user (personal use) · Unlimited passwords, passkeys, and storage · Unlimited devices
Billing risk: None
No card
✓ 28 Sep 2026
HostedScan · Security
14-day free trial · No credit card required · Cheapest paid plan (Basic): $39/month, 5 targets, unlimited scanning
Billing risk: Low
No card
✓ 28 Sep 2026
Intuition Machines · Security
Up to 10,000 requests/month · Works in every country
Billing risk: Low
No card
✓ 2 Oct 2026
SikkerKey · Security
10 machines included · Unlimited secrets, projects, reads, and rotations · 1 month audit log retention
Billing risk: Low
No card
✓ 28 Sep 2026
Azure · Security
No extra cost for managed identities · Assigned to Azure compute resources or supported app hosting platforms
Billing risk: Low
Card
✓ 28 Sep 2026
Cloudflare · Security
Up to 50 users · Gateway DNS filtering · Access policies
Billing risk: Low
Card
✓ 28 Sep 2026
Azure · Security
No charges for using Azure Policy on Azure resources · Azure Automanage machine configuration is free for Azure resources
Billing risk: Low
Card
✓ 28 Sep 2026
Microsoft · Security
Continuous security assessment (Azure, AWS, GCP) · Secure Score and security recommendations · Microsoft cloud security benchmark included
Billing risk: Low
Card
✓ 28 Sep 2026