The cloud platform has no free tier subscription; it has switched to one-time billing (see paid plans). The truly free offering is the open-source CLI: the official documentation states it can be installed via curl or pipx, provided Docker is running and you have an LLM API key from any supported provider (OpenAI/Anthropic/Google, etc.), meaning the software is free while inference costs are paid directly to the model provider; scan targets can be local code, a GitHub repo, or an online website, and the open-source version has no limit on scans or watermarks. The One-time Pentest plan includes “free retest after remediation”. (2026-09-09 browser direct read strix.ai/pricing)
As of 2026-09-16 the official pricing page has been restructured into "Usage only (No Success Package) + optional Success Package". The sign-up starting allowance is "US$5 free credits to get you started" (US$5 of prepaid credit, not minutes; credits are prepaid US dollars applied to Vapi hosting at US$0.05/minute plus model, voice, transcription and telephony costs, the latter four passed through at provider list prices with no markup). Usage only includes 4 concurrent calls, 2 organizations, 1 included Vapi phone number, 14 days raw data retention, full model catalog, full platform access, peer-to-peer support via the Discord community, and email support without SLA. When the balance reaches 0 and auto-reload is off, the subscription is frozen and no new calls can be started (docs.vapi.ai billing). The old wording "60+ minutes included", "10 concurrent lines included" and "US$10 credit" no longer appears on the official site. (Read directly from vapi.ai/pricing and docs.vapi.ai via playwright on 2026-09-16)
Official website states From US$59/pentest (single penetration test): self‑service testing of apps/APIs/repos. Includes white‑box and authorized testing, verified vulnerabilities with proof‑of‑exploit, autofix PR, OWASP Top 10 coverage, free retest after remediation. 2026-09-09 browser direct read strix.ai/pricing.
Full Audit
US$2000（One-time purchase）
Official website states From US$2,000/audit (single deep audit): includes the full One-time Pentest, plus business logic and attack chain testing, formal SOC 2/ISO 27001 report, customized scope and test accounts, review by a CREST‑certified penetration tester, and same‑day results.
Enterprise
Official quote (upon inquiry)
客製（Get a quote）：跨所有環境的週期性稽核，含內部 apps 與基礎設施、自訂範圍與 SLA、SSO、稽核日誌、專屬成功經理。
Vapi
Plan
Price
What you get
Usage only (No Success Package)
API pay-as-you-go (usage-based)
From US$0 (pre-paid): Vapi hosting US$0.05/minute; STT, LLM, TTS and telephony passed through at provider list prices with no markup; includes 4 concurrent calls, 2 organizations, 1 Vapi phone number and 14 days raw data retention; no response or uptime SLA (support starts at Core)
Core
US$29 / mo
US$29/month (pre-paid, auto-renew) plus usage fees: 2 organizations, 5 Vapi phone numbers, 10 concurrent calls, 30 days raw data retention, ZDR, email support, 2 business day response SLA
Pro
US$999 / mo
10% of Vapi hosting fees with a US$999 monthly minimum (model costs not included): 10 organizations, 10 Vapi phone numbers, 30 concurrent calls, 180 days raw data retention, RBAC + ZDR, email + dedicated Slack support, 1 business day response SLA, 99% uptime SLA
Premier
Official quote (upon inquiry)
Custom, direct sales only: custom number of organizations, concurrency, data retention and phone numbers, priority support, named support team (Agent Strategist, FDE Advisor, onboarding), 1 hour P0 response SLA, 99.9% uptime SLA, custom RBAC + ZDR + SSO, dedicated SIP
Which one should you pick?
If you want to try before paying, Vapi has a free plan and Strix does not — start with Vapi.
Strix has no public paid plan; Vapi starts at about US$29 / mo.
FAQ
Is there a free version of Strix?
No public free plan — a subscription is required.
How much does Strix cost?
The cheapest is the plan from Strix named One-time Pentest, at about US$59（One-time purchase）.
Does Strix support Chinese?
Strix has no Chinese interface at this time.
Is there a free version of Vapi?
Yes. As of 2026-09-16 the official pricing page has been restructured into "Usage only (No Success Package) + optional Success Package". The sign-up starting allowance is "US$5 free credits to get you started" (US$5 of prepaid credit, not minutes; credits are prepaid US dollars applied to Vapi hosting at US$0.05/minute plus model, voice, transcription and telephony costs, the latter four passed through at provider list prices with no markup). Usage only includes 4 concurrent calls, 2 organizations, 1 included Vapi phone number, 14 days raw data retention, full model catalog, full platform access, peer-to-peer support via the Discord community, and email support without SLA. When the balance reaches 0 and auto-reload is off, the subscription is frozen and no new calls can be started (docs.vapi.ai billing). The old wording "60+ minutes included", "10 concurrent lines included" and "US$10 credit" no longer appears on the official site. (Read directly from vapi.ai/pricing and docs.vapi.ai via playwright on 2026-09-16)
How much does Vapi cost?
The cheapest is the plan from Vapi named Core, at about US$29 / mo.
Does Vapi support Chinese?
Vapi only partially supports Chinese.
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