Free plan US$0, "Free forever". Included credits are "1,000 one-time", i.e. a single 1,000-credit grant (not monthly); the Weekly refresh column shows "–", meaning no weekly top-up (only paid plans get Pro +2,000/week and Max +4,000/week, reset every 7 days and not accumulated). 1 workspace, cannot invite teammates. Concurrent executions capped at 10; rate limits of 50 sync runs/min, 200 async runs/min and 30 API endpoint calls/min; execution timeouts of 5 minutes (sync) and 90 minutes (async); storage of 5GB of files, up to 5 tables, up to 50,000 rows per table, 30 days log retention. Not included on the free plan: Sim Mailer (Inbox), KB Live Sync, Sandboxes, Slack Connect, Access Control, SSO, SOC2 Compliance, Self Hosting, Dedicated Support. When credits run out, the official docs state "usage is capped at your plan's included credits and runs will stop" (runs stop by default; paid plans can enable on-demand overage at US$0.005/credit). 1 credit = US$0.005 (docs). The source conflict recorded on 2026-08-09 ("pricing page monthly vs docs one-time") is resolved: on 2026-09-16 both the pricing page and docs.sim.ai/platform/costs show 1,000 one-time / Pro 6,000 per month / Max 25,000 per month. Sim is an open-source project. (Read directly from sim.ai/pricing and docs via playwright on 2026-09-16)
Cheapest paid plan: US$25 / user / mo（5 user ≈ US$125/mo）
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)
US$25 per user/month: 6,000 credits/month + Weekly refresh of +2,000/week (reset every 7 days, not accumulated); annual billing averages US$21/month (site shows 15% off; docs state US$21.25/month = US$255/year); usage is capped at the plan's included credits by default, with optional on-demand overage at US$0.005/credit
Max
US$100 / user / mo（5 user ≈ US$500/mo）
US$100 per user/month: 25,000 credits/month + Weekly refresh of +4,000/week; annual billing averages US$85/month (15% off; docs state US$1,020/year); includes Sim Mailer (Inbox), KB Live Sync, Sandboxes and Slack Connect; does not include Access Control, SSO, SOC2, Self Hosting or Dedicated Support
Enterprise
Official quote (upon inquiry)
Pricing not published on the official site — contact sales
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?
Both offer a free plan. Compare paid tiers against your needs.
Sim：US$25 / user / mo；Vapi：US$29 / mo。Plans priced per person need to be multiplied by the number of people, and prices cannot be directly compared.
FAQ
Is there a free version of Sim?
Yes. Free plan US$0, "Free forever". Included credits are "1,000 one-time", i.e. a single 1,000-credit grant (not monthly); the Weekly refresh column shows "–", meaning no weekly top-up (only paid plans get Pro +2,000/week and Max +4,000/week, reset every 7 days and not accumulated). 1 workspace, cannot invite teammates. Concurrent executions capped at 10; rate limits of 50 sync runs/min, 200 async runs/min and 30 API endpoint calls/min; execution timeouts of 5 minutes (sync) and 90 minutes (async); storage of 5GB of files, up to 5 tables, up to 50,000 rows per table, 30 days log retention. Not included on the free plan: Sim Mailer (Inbox), KB Live Sync, Sandboxes, Slack Connect, Access Control, SSO, SOC2 Compliance, Self Hosting, Dedicated Support. When credits run out, the official docs state "usage is capped at your plan's included credits and runs will stop" (runs stop by default; paid plans can enable on-demand overage at US$0.005/credit). 1 credit = US$0.005 (docs). The source conflict recorded on 2026-08-09 ("pricing page monthly vs docs one-time") is resolved: on 2026-09-16 both the pricing page and docs.sim.ai/platform/costs show 1,000 one-time / Pro 6,000 per month / Max 25,000 per month. Sim is an open-source project. (Read directly from sim.ai/pricing and docs via playwright on 2026-09-16)
How much does Sim cost?
The cheapest is the plan from Sim named Pro, at about US$25 / user / mo.
Does Sim support Chinese?
Sim only partially supports Chinese.
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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