Aivastark vs Twig
Both are AI agents for small businesses that answer questions, book appointments and hand off to a person. Twig is built voice-first around a phone line. Aivastark is built around messaging. Which one fits depends mostly on how your customers reach you.
Free plan, no card · 7-day trial on paid plans
Choose Twig if
- Your customers phone you: Sera answers calls on every plan
- You want calls, texts and chats in one agent
- You need SSO/SAML sign-in
Choose Aivastark if
- Your customers message you on Instagram, Messenger or Telegram
- You want booking on your entry plan, not from $499
- You want 5,000 AI replies for $39 and a free plan to start on
Aivastark or Twig: which should you choose?
Choose Twig if your customers phone you. Its Sera front desk answers real calls on every plan, and also replies by text, web chat, email and WhatsApp. Choose Aivastark if your customers message you, especially on Instagram, Messenger or Telegram, which Twig doesn't list, and you want far more conversations per dollar. Aivastark's $39 plan includes 5,000 AI replies; Twig's $49 plan includes 500 chats.
- AI replies on Aivastark's $39 plan, AI chats on Twig's $49 plan
- 5,000 vs 500AI replies on Aivastark's $39 plan, AI chats on Twig's $49 plan
- the first plan that books appointments
- $39 vs $499the first plan that books appointments
- Twig answers phone calls; Aivastark has no phone line
- Every planTwig answers phone calls; Aivastark has no phone line
- Aivastark's free plan; Twig offers a 15-day trial instead
- $0Aivastark's free plan; Twig offers a 15-day trial instead
Aivastark and Twig, row by row
| Feature | Aivastark | Twig |
|---|---|---|
| Built around | Messaging: website, WhatsApp, Instagram, Messenger, Telegram, email | Phone front desk (Sera), plus SMS, web chat, email and WhatsApp |
| Pricing unit | Credits: 1 per standard reply (a conversation is several) | AI chats plus voice minutes |
| Free plan | $0 forever, 300 replies, no card | None; 15-day free trial, no card |
| Entry paid plan | $12/month (1,000 replies); $39 Starter (5,000) | $49/month Starter (500 chats, voice included) |
| Mid tier | $129 Growth: 25,000 replies | $499 Growth: 2,000 chats + 300 voice minutes |
| Appointment booking | From Starter ($39), into Google Calendar or Cal.com | From Growth ($499); not on Starter |
| Overage | $1.20–$4.00 per 1,000 replies | $100 per 1,000 chats; $1 per voice minute (Growth and Scale) |
| Phone calls | No phone line (in-widget voice calling is in beta) | Yes, on every plan (300 minutes on Growth) |
| Removing vendor branding | Badge can be hidden on Scale ($319); custom white-label arrangements on Enterprise, on request | "Powered by Sera" removed on Growth ($499) and Scale |
| Trial | 7 days on paid plans, card required | 15 days on every plan, no card |
Twig figures checked October 2026 on Twig's own pages (sources below). Pricing moves, so check the vendor before you decide. Aivastark allowances are counted in credits: a standard reply is 1 credit and a gpt-4o reply 10; images, voice and tool steps add more.
Where Twig is the better choice
Stated plainly, because a comparison that wins every row is an advert.
Real phone answering on every plan. If most of your enquiries arrive as calls, Twig does something Aivastark doesn't.
One agent across phone, SMS, web chat, email and WhatsApp, so a conversation that starts in chat can finish on a call.
SSO/SAML sign-in. Aivastark doesn't offer single sign-on.
Twig sets up your phone number, knowledge base and booking integration during the trial.
Checks answers against sources before sending, with confidence-based escalation.
A longer trial with no card: 15 days on every plan, against Aivastark's 7 days with a card.
Calls or messages: decide this first
Sera is a front desk that answers the phone, and also replies by text, web chat, email and WhatsApp. Aivastark doesn't take phone calls. It answers where people type: your website, WhatsApp, Instagram DMs, Messenger, Telegram and email, all into one inbox. If your phone rings more than your DMs, start with Twig. If your customers message you, and especially if they find you through Instagram or Facebook ads, Aivastark covers those channels and Twig doesn't list Instagram, Messenger or Telegram.
What the money buys
Twig prices per chat: $49 for 500, $499 for 2,000, and $100 per extra 1,000. Aivastark prices per AI reply: $39 for 5,000, $129 for 25,000, and $1.20–$4.00 per extra 1,000. If a conversation averages five AI replies, $39 of Aivastark covers about 1,000 conversations, twice Twig's $49 allowance for $10 less.
Booking is the other line to read. Twig lists booking, missed-call recovery and human handoff from its $499 Growth plan, not on the $49 Starter. Aivastark books into Google Calendar or Cal.com from its $39 Starter plan. Your own reply-per-conversation ratio decides the exact figures, so run them with your numbers.
Where Twig is the safer choice
Procurement-heavy buyers get more from Twig today: SSO/SAML is on the table, and Twig sets up your number, knowledge base and booking integration during the trial. Aivastark includes a GDPR DPA on every plan, but it doesn't offer SSO, and setup is self-serve, with done-for-you setup on request.
Aivastark vs Twig: questions
Is Twig an AI receptionist?
Yes. Twig's product, Sera, is sold as an AI front desk that answers calls, texts, web chat, email and WhatsApp, books appointments and escalates to staff. Plans start at $49/month for 500 chats; booking and human handoff are listed from the $499 Growth plan.
Does Aivastark answer phone calls?
No. Aivastark answers messages on your website, WhatsApp, Instagram, Messenger, Telegram and email. In-widget voice calling (beta) is on Growth, but there's no phone number.
Which is cheaper, Twig or Aivastark?
For messaging volume, Aivastark by a wide margin: $39 buys 5,000 AI replies against $49 for 500 chats on Twig. For phone calls, Aivastark isn't an option.
Does Twig have a free plan?
Not any more. Twig's paid plans each start with a 15-day trial with no card. Aivastark's free plan is permanent, needs no card and includes 300 AI replies a month.
Can I switch from Twig to Aivastark?
Yes. Point Aivastark at the same website and documents. Calendar booking works through Google Calendar or Cal.com, and Calendly can send your booking link. Phone handling doesn't carry over.
Where these figures come from
Every Twig figure on this page was read on Twig's own pages in October 2026. Spot one that has moved? Email support@aivastark.com.
Product names and logos belong to their owners and are shown only to identify the products compared; no affiliation or endorsement is implied.
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- AI receptionistAnswers and books for appointment-based businesses, any hour, in your DMs.
- For dental practicesNew-patient questions and bookings, from your own fees and hours.
Try it against your own questions.
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- 7-day trial on paid plans
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