Retell AI Alternative in India: Indian Voices + WhatsApp
Teams using a low-latency voice API built for developers often look for an alternative when they need genuinely natural Indian-language voices across Hindi, Tamil, Telugu and Marathi, a visual builder non-engineers can use, and WhatsApp automation in the same workspace as their calling flows.
- Convo360 lets you choose Exotel, Plivo, Twilio or your own SIP trunk for AI voice calls.
- Sarvam and Smallest.ai give natural Indian-language voices across Hindi, Tamil, Telugu and Marathi.
- Pricing is a flat monthly platform fee — you pay telephony minutes directly with no added markup.
- WhatsApp automation runs in the same Flow Builder as your voice agent.
Who looks for a Retell AI alternative
Engineering teams that adopted a low-latency voice API valued the call quality and response speed, which matters a great deal for a natural-feeling conversation. Where an alternative starts to look attractive for an Indian business: regional-language voice quality beyond Hindi and English (Tamil, Telugu, Marathi, Bengali) is often thinner on a globally-focused voice API; the call script and logic living entirely in code or a developer console means every change needs an engineering cycle; and WhatsApp needs a completely separate integration rather than sharing the same workspace as the voice agent.
Businesses serving customers across multiple Indian states in their own languages feel this gap the most: see AI voice for regional languages for what "good enough" pronunciation actually requires.
None of this needs to happen overnight. Most teams run the two platforms side by side for a week or two on a subset of contacts, checking that AI reply quality and call quality meet their bar, before pointing all live traffic at the new setup.
What Convo360 is
Convo360 (convo360.ai) is an India-first platform for AI voice calling and WhatsApp / omnichannel chatbots, built by A Plus Solution in Mumbai. It runs on a Bring Your Own Keys (BYOK) model: you connect your own OpenAI, Anthropic Claude or Google Gemini account, your own WhatsApp Business number and your own telephony account, and Convo360 adds zero markup on messages, minutes or AI tokens. A no-code Visual Flow Builder covers chat, voice, CRM, forms and integrations under one login, with plans starting at ₹999/month (ex-GST).
Because everything runs from one login, a founder or ops manager can check chat volume, call outcomes, CRM stage and campaign performance in a single analytics view, instead of stitching reports together from two or three separate tools.
Convo360 is not affiliated with Retell AI; all trademarks belong to their owners.
Comparing the models
The table below compares two general pricing and access models for AI phone-calling software, not one brand against another. Plenty of tools in this category are strong on call quality. Use it to see which model matches how you plan to run calls day to day.
| Typical tool in this category | Convo360 | |
|---|---|---|
| Telephony choice | Often one bundled carrier or a limited set of numbers | Exotel, Plivo, Twilio or your own SIP trunk, you choose |
| Indian voices | Mostly global TTS voices, Indian languages often thin | Sarvam (India-native) and Smallest.ai alongside ElevenLabs and OpenAI |
| WhatsApp + calls together | Usually calling-only, WhatsApp needs a separate tool | One Flow Builder handles both channels in the same conversation |
| Pricing model | Per-minute platform markup on top of carrier cost | Flat monthly platform fee; you pay the telephony provider directly |
| No-code editing | Often developer-first (API/SDK, code-based prompts) | Visual, drag-and-drop Flow Builder for non-engineers too |
As with any category comparison, the left column describes a general industry pattern, not a specific claim about any named product. Check a vendor's own pricing and documentation for their current plan details.
What you get on Convo360
Convo360 pairs Sarvam (India-native, bulbul v3) and Smallest.ai with ElevenLabs and OpenAI, so Hindi, Tamil, Telugu, Marathi, Bengali, Gujarati, Kannada, Malayalam, Odia and Punjabi are first-class options, not an afterthought, alongside Hinglish/code-mixed speech. The call flow, gather, DTMF menu, transfer, play audio, voicemail, is built and edited in the Visual Flow Builder rather than in code, and call recording, transcripts and summaries are available for quality review. WhatsApp, Instagram, Messenger and website chat sit in the same workspace, so a call and a follow-up message share one contact record and CRM stage.
How to migrate from Retell AI
Moving a voice agent off Retell AI mainly means re-pointing three things, not starting from zero:
- Export your call contact list (leads, customers, appointment lists) as a CSV and import it into Convo360's contacts.
- Re-point your existing telephony number, Exotel, Plivo, Twilio or a SIP trunk, to Convo360, or connect a new number from one of those providers if you're switching carriers at the same time.
- Recreate your agent's system prompt and call script in the Visual Flow Builder's voice blocks (gather, DTMF menu, transfer, play audio, voicemail); most teams reuse the same prompt wording almost as-is.
- Pick a voice from Sarvam, Smallest.ai, ElevenLabs or OpenAI, and test pronunciation on a few real Indian names and places before going live.
- Run a handful of test calls to yourself or a colleague, then switch your live number over.
Keep your old bot paused rather than switched off entirely until you've watched the new one handle a full day of real traffic without surprises.
What it costs
Voice calling is included on the Pro plan at ₹2,999/month (ex-GST), a flat platform fee; telephony minutes bill directly from your chosen provider (Exotel, Plivo, Twilio or SIP) at their own rate, with no additional platform markup per minute. Check the current pricing page for a low-latency developer voice API for its per-minute rate structure. Models change, and latency-per-rupee is worth comparing directly at your expected call volume.
Paying yearly instead of monthly saves roughly 10% (₹10,789 for Starter, ₹32,389 for Pro, ₹86,389 for Business, per year, ex-GST) if you'd rather budget it once and not think about it again.
Who should not switch
If ultra-low latency for a highly specialised real-time use case is the single deciding factor and you have engineering capacity to keep optimising a code-first stack, a developer-focused voice API may remain the better technical fit. This alternative is aimed at teams for whom Indian-language coverage and a non-engineer-editable flow matter as much as raw latency.
The 14-day free trial, every feature unlocked, no credit card, is built for exactly this kind of side-by-side comparison, so you can judge the fit on your own conversations before deciding either way.
Example conversation
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Frequently asked questions
Is Convo360 a good Retell AI alternative for small businesses in India?
Yes. Convo360 pairs Indian telephony (Exotel, Plivo, Twilio or your own SIP) and Indian-language voices with a flat monthly platform fee, which is usually simpler to budget for than a purely usage-metered developer platform.
Can I move my contacts/flows from Retell AI?
Contact lists export as CSV and import straight into Convo360's contact groups. Your calling agent's prompt, call flow and voice choice are recreated in the Visual Flow Builder, typically in a single working session.
Will I keep my business phone number for AI calls?
Usually yes — you point your existing Exotel, Plivo or Twilio number (or SIP trunk) at Convo360, or port the number to one of those providers first. Your callers see the same number either way.
How is pricing different?
Convo360 charges a flat monthly platform fee and you pay your telephony provider directly for minutes at their own rate — there's no additional per-minute platform markup layered on top of the carrier cost.
Do you also support WhatsApp chatbots?
Yes. The same Flow Builder that runs your voice agent also runs WhatsApp, Instagram and website chat, so a missed or completed call can trigger a WhatsApp follow-up automatically.
Related reading
Available across India — see WhatsApp & AI calling automation by state and city.