Prompt Security alternative — full-stack PR-time + runtime + supply-chain + auditor bundle, not just runtime LLM guardrails

Updated

Prompt Security is a GenAI security platform focused on protecting AI applications and employee AI usage from prompt injection, data leakage, and shadow AI. Lakera-adjacent in scope. Strong on runtime guardrails; lighter on PR-time + supply-chain coverage. Here's the verdict for AI-built SaaS.

People searching for a Prompt Security alternative in 2026 split into two audiences. The first: AI-built SaaS startups who realized PR-time + deploy-time + supply-chain coverage is missing from their stack and Prompt Security alone doesn't fill the gap. The second: enterprise security teams comparing GenAI-security vendors (Lakera Guard / Prompt Security / Microsoft AI Defender) and looking for a more breadth-focused platform that covers the code-side as well as the runtime-side. Securie is positioned for both — PR-time auto-fix on the code-side, runtime eBPF on customer-app containers, plus the auditor / regulator surface most pure-runtime AI security platforms don't ship. This page is the honest read on when Securie wins (broad AI-built-app scope) and when Prompt Security wins (enterprise GenAI runtime guardrail at scale).

Why people leave Prompt Security

  • Runtime-focused scope — fewer specialists for PR-time + deploy-time + supply-chain bug classes
  • Less coverage of vibe-coded-app vulnerability patterns (RLS, BOLA, leaked secrets)
  • No sandbox-verified exploit reproduction — findings rely on classifier confidence
  • Limited integration with vibe-coding deploy platforms (Vercel / Netlify / Cloudflare / Fly / Railway)
  • No auditor / attestation chain (DSSE, Sigstore rekor) for compliance-driven enterprise sales

Why Securie instead

PR-time + deploy-time + runtime, not just runtime

Securie runs in your GitHub App (PR-time), your Vercel hook (deploy-time), and on customer-app containers via eBPF (runtime). Prompt Security is primarily runtime guardrails.

Specialist roster for vibe-coded apps

Supabase RLS, BOLA, leaked secrets, prompt injection, MCP guard, slopsquatting heuristic. Prompt Security covers prompt injection well; the rest is uneven.

Sandbox-verified findings

Every alert ships with a working exploit reproduced in a Firecracker microVM. No exploit, no ticket.

Auditor bundle + attestation chain

DSSE-signed in-toto + SLSA Level 3 provenance, optional Sigstore rekor publication. Built for the auditor / regulator / insurer surface.

Pricing

Prompt Security: enterprise contracting (not list-priced as of audit). Securie: free during early access; $12-$299/mo when paid tiers start. Combined cost lower than Prompt Security alone for most teams.

Migration path

  1. If Prompt Security covers your runtime LLM guardrail need today, keep it — Securie is complementary, not a 1:1 replacement on runtime
  2. Install Securie GitHub App for PR-time + deploy-time coverage that Prompt Security doesn't supply
  3. Compare findings — Prompt Security finds runtime prompt-injection attempts; Securie finds the bug classes that ship the vulnerability into production
  4. Most teams keep both: Prompt Security as the runtime guardrail, Securie as the prevent-and-attest layer

Pick Securie if…

You ship AI-built SaaS, you want PR-time auto-fix + deploy-time gates + supply-chain attestation, and your AI feature scope is bounded enough that runtime LLM guardrails alone don't cover the surface.

Stay with Prompt Security if…

Your primary security need is runtime LLM guardrails for an enterprise GenAI deployment with hundreds of internal users, and PR-time / deploy-time / supply-chain are covered elsewhere.