the phone line can narrow your shortlist of ai voice agent platforms in india. next, look at what the agent can do during a call and what you'll pay once you add the phone charges. rumik (that's us) can answer calls on an eligible +91 mobile number over sip and connect to the tools your team already uses.

we wrote this for business owners, ops teams, and developers choosing a voice agent for customer calls in india. we compare six platforms on phone setup and integrations, walk through appointment booking, and break down the cost of 5,000 connected minutes so you can budget for a rollout.

compare ai voice agent platforms in india

rumik voice agents

what is rumik silk?

rumik silk is a voice platform with two ways to use it. its text-to-speech api turns written text into audio. its voice-agent builder lets you set up an ai receptionist or another agent that can listen, reply, and use your business tools on a phone or web call.

rumik is the ai research lab behind silk. our goal is to build the most human ai. silk puts that voice research to work in customer conversations through our mulberry and muga speech models.

key features for inbound and outbound calls

• keep your +91 mobile number. if your carrier can route calls over sip, connect the number to silk and choose which agent should pick up. the number stays with your carrier. you can also rent an indian number from us once your business is verified.

• look up records while the caller is still on the line. connect your api to silk with a custom http tool. if a customer calls about a delivery, the agent can look up their order and read back the latest status from your system. hear the order tracking demo.

• offer hindi and english on customer calls. you can choose from 11 languages in silk mulberry 1.6. hear our hindi speech samples and indian english accent samples before you pick a voice to test on the phone.

• schedule outbound calls and review what happened. give silk your contact list and set a time to call. you can use the details in that list to personalize the calls and set retries for people who don't pick up. afterwards, you can listen to the recordings or read the transcripts.

rumik voice agent pricing

we have two ways to pay for silk. if you pay as you go, your bill follows your call minutes. on a monthly plan, the agent fee depends on how many calls and speech requests you need to run at once. we price india accounts in inr and accounts elsewhere in usd.

pay as you go

we charge for the time each call runs. there's no monthly subscription, and you get four slots to share between calls and text to speech.

note: for 1,000 one-minute calls in a month, rumik silk mulberry costs ₹1,990 on pay as you go in india, compared with ₹3,500 on sarvam ai pay as you go and about ₹7,523 ($80) on the elevenlabs creator plan at its standard monthly price with extra minutes.

unlimited monthly plans

pick the number of slots you need, and we'll charge a fixed monthly fee for that capacity. that fee covers unlimited agent minutes and text to speech.

each call keeps one slot busy until it ends. on either plan, you'll pay carrier charges and any phone number rental separately.

when to choose rumik

silk fits teams that want to give an agent a share of their incoming calls or outbound follow-ups.

• you want to keep the number your customers already call. use an eligible +91 mobile number over sip and have the agent answer incoming calls on that line.

• your callers need answers from your own records. if your team usually has to pull up a record before it can answer, connect the agent to the api that provides that information.

• you want a fixed monthly agent fee. if you have steady call volume and know how many calls overlap, pick the shared capacity you need and run unlimited agent minutes at that monthly price.

• you want to talk through your setup with the team. contact rumik about your phone route, the systems you want to connect, or the number of calls you need to handle at once.

bolna

bolna runs voice agents for incoming calls and outbound campaigns. it gives teams control over which providers handle speech recognition, responses, and voice.

key features for model choice and phone setup

• choose the models behind the call. set the speech recognition model, language model, and voice separately in agent studio. you can connect your own provider keys if you already pay for those services.

• connect your indian phone line. bolna supports plivo, exotel, vobiz, and compatible sip trunks. check that your number and carrier support the direction you need, whether you're taking calls or placing them.

• connect tools your agent can use during a call. bolna's cal.com tools check availability and create bookings. if your team uses another system, a custom function can call your api.

bolna pricing

on bolna's pay-as-you-go plan, bundled models start at $0.06 per minute. platform and carrier charges are separate, and the model bill can change if you bring your own keys. its one-time pilot starts at $300 for 6,500 minutes, metered in 30-second increments.

sarvam ai

sarvam's samvaad runs inbound and outbound voice agents. it supports 11 indian languages plus english, including calls where customers mix languages.

if you already run an agent and only need the speech layer, our silk vs sarvam ai comparison covers voice controls and text-to-speech pricing.

key features for indian phone lines and call handoff

• rent a number or bring your own carrier. sarvam rents numbers through vobiz and supports carrier accounts such as exotel, plivo, and smartflo. sarvam sets up custom sip on business and enterprise plans.

• pass a live call to your team. you can transfer calls with vobiz or plivo. if you use exotel, configure the transfer in your exotel app.

• connect your agent to your own api. the api tool can send a request during a call and use data from the response. custom tool authoring is part of sarvam's enterprise plan.

• test conversations before they go live. sarvam lets you run scripted conversations against an agent to check how it responds before you put it on a phone line.

sarvam ai pricing

with sarvam's pay-as-you-go plan, you pay ₹3.50 per agent minute. pro costs ₹3.25 per agent minute with a ₹9,999 monthly minimum that goes toward usage. sarvam rounds each connected call up to a whole agent minute. on its vobiz route, phone charges are separate at ₹0.20 per 30 seconds, and number rental is ₹59 per 30 days. prices exclude gst.

omnidimension

omnidimension is a voice agent builder for inbound and outbound calls. it's useful to look at if you want to connect an agent to the calendar or crm your team already works in.

key features for phone setup and business tools

• bring a number you already use. set up a call flow in exotel, then import your number into omnidimension. you can also connect a compatible sip trunk on starter and higher plans.

• connect your calendar and crm. the google calendar integration checks availability and creates meetings. the hubspot integration can send call results to your crm after the call.

• use your own api during a call. attach a custom api action to an agent so it can look up data or send an update through the endpoint you configure.

omnidimension pricing

omnidimension's starter plan adds $20 to your wallet each month and deducts $0.063 per minute of voice usage. you can also top up without a subscription. indian top-ups start at ₹1,900 plus gst. phone usage and number rental are billed separately. accounts start with one shared call channel, and extra channels cost $6.74 each per month.

ringg ai

ringg ai runs inbound and outbound voice agents. you can build one from a prompt or use a visual flow when a conversation needs several paths.

key features for call flows and outbound campaigns

• map out different paths through a call. ringg's visual editor lets you give different parts of the conversation their own prompts and set the rules for moving between them.

• call your api before, during, or after a call. attach an api tool and pass it information from the conversation or the agent's variables. a tool that runs during the call can return information the agent uses in its reply.

• connect an existing phone number. ringg supports accounts from carriers including exotel, plivo, and vobiz, as well as compatible sip trunks. you can also rent a number through ringg.

• schedule calls from a contact list. upload a csv, set when the agent can call and how it should retry, then review the results in call logs.

ringg ai pricing

on ringg's pay-as-you-go plan, you pay ₹6 per connected minute in india, billed by the second. the rate covers the speech and language models, basic analytics, and phone usage on ringg's own telephony. if you bring a carrier, it bills you separately. number rental costs ₹499 per month. two simultaneous calls are included, and extra capacity and advanced analytics cost more.

retell ai

retell ai lets you build an agent from a prompt or map out the call as a series of steps. it's worth a look if your team wants that control and can set up the phone route with an indian carrier.

key features for call flows and carrier setup

• bring an exotel number over sip. connect an exotel sip trunk to retell to take and place calls in india. on plivo, confirm that your retell deployment can handle sip traffic in india before connecting a +91 number.

• decide how the call moves from one step to the next. retell's conversation flow lets you set instructions, tools, and conditions for different parts of a call.

• connect the agent to your own api. a custom function sends the details gathered on the call to your endpoint and can use the response in the conversation.

retell ai pricing

retell's pay-as-you-go voice agents start at $0.07 per minute. your rate depends on the models and settings you choose. with custom sip, retell charges for the agent and your carrier bills for phone usage and any number rental.

ai voice agents for existing +91 numbers

rumik silk can answer calls on your existing +91 mobile number if your carrier supports inbound sip routing. use the following steps when customers already call your business on that number and you want a silk agent to pick up:

1. check your number with your carrier. ask if it can route incoming calls for that specific number over sip.

2. register the sip trunk in silk. connect the route your carrier provides.

3. assign a deployed agent to the trunk. the agent can then answer calls that come in on that route.

customers keep dialing the same number, and it stays with your carrier. if your carrier can't route it over sip, check whether you can forward calls or use a new number.

to show your existing number when the agent calls customers, confirm that your carrier and platform let you use it as the outbound caller id.

test transfers to your team on the phone setup you plan to use. check where the agent can send the call, what happens when nobody picks up, and who bills for the rest of the call.

ai voice agents for appointment booking in india

with rumik silk, callers can book an appointment by phone in the scheduling system your team already uses. connect our appointment booking agent to your scheduling api with a custom http tool.

when someone calls to book, the agent checks your scheduler and offers available times. once the caller picks a slot, the agent sends the booking request. set it to confirm the appointment only after your scheduler reports that it saved the booking.

if you already use cal.com, bolna and retell offer booking tools for it. omnidimension has a google calendar integration. on sarvam, use the enterprise plan if you need to build a custom tool for your scheduler.

run the same checks on each platform you shortlist. if callers switch between hindi and english, test code-switching and check that the right date and time reach your scheduler. our hinglish text-to-speech guide shows how to hear the same scripted reply from romanized hindi and devanagari.

voice agent costs at 5,000 connected minutes

the estimates use 5,000 one-minute calls over 30 days, with one phone number and one active call at a time. they exclude taxes, transfers, and optional add-ons. currency conversions use ₹94.04 per $1 (12 november 2026).

both plivo estimates include ₹2,100 (≈ $22.33) for calls and one number. the bolna setup uses plivo's voice api rates. the retell setup uses plivo's sip rates and requires a compatible india deployment.

call length can change the bill even when total connected minutes stay the same. sarvam rounds each call up to a whole agent minute and bills the phone side separately in 30-second increments. on pro with vobiz, 4,000 calls of 75 seconds cost ₹28,459 (≈ $302.63), or ₹10,150 (≈ $107.93) more than the one-minute calls above. the pro minimum goes toward the agent charges.

choosing a platform for your first rollout

i'd start with the number customers already call and one job your team handles every day. that first rollout should tell you what you need from the platform.

• choose rumik silk if you want unlimited agent minutes at a fixed monthly fee. keep your eligible +91 mobile number, connect your own api, and pick a plan based on how many calls and speech requests you need to run at once.

• choose bolna if you want to pick the speech recognition, language model, and voice separately or use provider accounts you already pay for.

• choose sarvam ai if you need its indian-language coverage and live transfers through vobiz, plivo, or a configured exotel account.

• choose omnidimension if your team wants to use its google calendar or crm integrations in an existing workflow.

• choose ringg ai if you want to schedule outbound campaigns from a contact list and have phone usage included when you use ringg's telephony.

• choose retell ai if you want to map out the conversation step by step and your team can configure the indian carrier route it needs.

is rumik silk right for you?

i'd recommend rumik silk if you want to put an agent on your business line and try it with the tools your team already uses.

• you want a team that takes initiative. we're a hands-on, ambitious team. we'll make your rollout a priority and work with you to get your silk agent ready for customer calls.

• you want to hear the agent before your customers do. try your own greeting and common customer questions on a test call. speak while the agent is replying to check how it handles barge-in.

• you want to start with one workflow. give the agent one job, such as qualifying sales leads, and connect the tools it needs for those calls.

pick one call your team handles every day and build your first silk voice agent around it in the rumik playground. if you'd like help connecting your phone number or the tools your agent needs, get in touch with us.