prepaid.ai vs Upfirst
Upfirst and prepaid.ai both put an AI on your phone to answer and book. Upfirst bills per call on a monthly or annual plan, with a fee for each call past the plan. prepaid.ai sells prepaid plans of minutes that run for a set number of days, metered per second. If your calls are long and few, per-minute plans tend to suit you; if they are short and many, per-call plans can.
Last checked · their details from Upfirst’s own public pages, prices as listed there
What each one offers.
Ours is read from our live plans in the United States. Theirs is what their own pages said; the small number beside a fact points to the page it came from.
| Feature | prepaid.ai | Upfirst |
|---|---|---|
| How you pay | Prepaid plans of 30 days with minutes included, metered per second. Top up when you need more. | Per call: a monthly plan includes a set number of calls, then a fee for each extra call. Spam, and calls under 15 seconds, are not billed.1 |
| Starting price | US$29 for 100 minutes every 30 days (Lite, United States). | $24.95/month for 30 calls (Starter), or $20/month billed annually, then $1.50 a call.1 |
| Free trial | 7 days free, no card. Build your AI and talk to it in the browser first. | 14 days or 100 calls, whichever comes first; “No credit card required”.12 |
| Contract | None. A plan runs 30 days; recharge when you want to. | “There are no contracts, and you can cancel from your account.”2 |
| Who answers | An AI phone line. We don’t offer live human receptionists. | An AI receptionist, 24/7.2 |
| Books appointments | Yes, during the call, into a time it has checked is free. | Yes, it “checks your calendar while the caller is on the line and books an open time”.2 |
| Calendars named | Its own calendar, plus Google Calendar by sign-in and any iCal link for busy times. | Google Calendar, Calendly, Acuity, Square and Clio among those named.2 |
| Tells callers it’s an AI | Yes, at the start of every call, in the words each country asks for. | Not stated on their public pages |
| Numbers and countries | A local number in the United States, New Zealand, Australia, the United Kingdom, Canada, Ireland, Spain, France, Germany and Netherlands, or forward the number you have. | “Every plan also comes with its own Upfirst number”, or forward your existing number. No countries named.12 |
| Integrations and API | An MCP server, an API and webhooks. | Zapier, and Custom Actions to connect “nearly any app that has an API”.2 |
Honest about where each one wins.
- Your calls are short and frequent, since you pay per call, not per minute.
- Callers speak languages other than English. They list English, Spanish and “35+ other languages”.
- You want the same AI to answer texts as well as calls.
- You want to pay ahead: a 30-day plan with minutes included, and no contract.
- You want callers told it’s an AI at the start of every call.
- You want it to book into Google Calendar while the caller is on the line.
- You want a local number in the United States, New Zealand, Australia, the United Kingdom, Canada, Ireland, Spain, France, Germany and Netherlands.
- You want to hear your own AI before you pay, with 7 days free and no card.
Upfirst’s details were read on their own pages on . Prices and plans change, so check their page before you decide. Anything their pages did not state is left blank above rather than guessed.
- 1Upfirst pricingupfirst.ai/pricing
- 2Upfirst home pageupfirst.ai/