25 free voice minutes — real, telephony-grade calls, telephony included — on curated free models (Prana LLM plus gpt-4o-mini), plus 200 free chat replies. Premium LLMs (Claude, Gemini, GPT-4o full, GPT-5) are PAYG-only. Bringing your own number is fully open on Trial. No card required.

Voice agents stop placing/answering calls until you top up or subscribe. Topping up moves you to Pay As You Go automatically — no contract, no monthly fee. Your existing agents, flows, and integrations carry over instantly. Trial-only model gating lifts the moment you leave Trial.

Pay As You Go has zero monthly fee — you pay a flat ₹2/min for voice calls on standard voices, or ₹2.5/min on premium voices, telephony included either way. Calls are metered in 30-second pulses, not rounded up to the next whole minute. Chat replies are usage-based, never a flat quoted rate. Prefer predictable billing? Pro is ₹2,499/mo and Scale is ₹4,999/mo — each subscription hands its own fee straight back as usage credit, spent before your own top-up money, so most months the plan pays for itself in what it lets you use. Scale also takes 5% off every voice minute once you go past the credit. INR via Razorpay/UPI, GST invoices on every transaction.

Standard voices are ₹2/min, premium ₹2.5/min, and Studio Voices ₹3/min — ₹1.90 / ₹2.375 / ₹2.85 on Scale, which takes 5% off all three. All three rates are flat and all-inclusive — telephony is in the price, there is no per-language surcharge, and nothing else is metered on top of the minute. Premium voices are our most lifelike stock voices. Studio Voices go a step further: pick a curated studio voice or clone your own (up to 10 on Pro, 20 on Scale), on Pro and above. You pick per agent, so you are never moved onto a higher rate without choosing it — most agents run happily on standard voices.

In 30-second pulses, from the moment the call connects. A 40-second call bills as 60 seconds, not as two whole minutes. Plenty of platforms round every call up to the next full minute, which quietly adds 20–40% to a bill made of short calls — collections reminders and delivery confirmations especially.

Separately from phone calls, and it is worth keeping the two apart. Chat replies are usage-based — the Trial includes 200 free, and there is no monthly fee on Pay As You Go. WhatsApp calls are ₹2.5 a minute billed by the whole minute, because Meta meters that leg per minute: the 30-second pulses above apply to our own phone lines only. Meta charges separately, per message, at rates it publishes and changes itself — in India ₹0.8631 for marketing and ₹0.1150 for utility or authentication, before 18% GST. Replies you send inside a customer’s 24-hour window are free until 1 October 2026, after which Meta charges for them at the utility rate. Using only the WhatsApp API from your own software, with no agent of ours? There is no monthly fee, and the Trial includes 200 WhatsApp messages, one time, with none of our charges. More on the WhatsApp Business API.

Pro is ₹2,499/month (₹29,988 billed yearly — no discount for paying annually, you simply get the year's credit up front). It grants ₹2,499 of usage credit every month, spent before your own balance, and adds Studio Voices at ₹3/min, cloning up to 10 voices, 5 agents across 2 workspaces with 2 team members, 10 concurrent voice calls, white-label branding, and 49-day call recordings. It's the tier most teams should be on.

Scale is ₹4,999/month (₹59,988 billed yearly — same reason as Pro, no discount, just the credit up front) on top of the same usage-based rates as Pay As You Go. It grants ₹4,999 of usage credit every month, and adds team workspaces (5 organizations, 5 seats), 15 concurrent voice calls instead of Pro's 10 (more on request), 5% off every voice minute, cloning up to 20 voices, white-label branding, and priority support. It's sales-assisted today — use the Talk to sales button to get set up.

A negotiated contract: custom volume, concurrency and cloned-voice limits, dedicated capacity, SSO/SAML and audit logs, an uptime commitment, and a dedicated point of contact. Pricing and limits are worked out with our team rather than posted here — write to hello@thinnest.ai.

Yes, from Settings → Billing. Trial → Pay As You Go happens automatically the moment you top up. Pay As You Go can subscribe to Pro or Scale directly. Moving from a paid subscription back to Pay As You Go takes effect immediately and your balance keeps working; moving between Pro and Scale needs the current one to end first — cancel it, keep access until the period you already paid for runs out, then subscribe to the other. Enterprise is a sales conversation in both directions — write to hello@thinnest.ai.

Yes — Razorpay handles all Indian methods (UPI, net banking, RuPay/Visa/Mastercard cards, wallets). Enterprise customers can pay via bank transfer / NEFT / RTGS with GST invoices. We don't accept crypto.

Yes — that's the Trial plan above. Sign up with email or Google, get 25 voice minutes immediately. No card, no commitment, Plivo number import unlocked, all 22 scheduled Indian languages and English.

We publish honest head-to-head comparisons with every major voice AI platform. See all 15 comparisons — each one breaks down real pricing math, feature matrices, and the cases where the competitor is actually the better pick.

No. You can buy an Indian phone number directly from us in a click — ₹349/mo on Pay As You Go, ₹249/mo on Scale — we provision and configure it for you (including TRAI 140-series). Or import a number you already have with Plivo: you keep paying Plivo directly, and we charge ₹0 for it.

Workspace caps are smaller (1 agent vs PAYG's 2) and concurrent calls are capped at 1 vs PAYG's 5. Otherwise the platform is the same — same flow editor, same telephony, same Indian-language coverage, same SDKs and webhooks.