# coss.com vs Plivo (https://coss.com/compare/plivo)

> Plivo has voice, WhatsApp and short codes, sold through sales with a monthly commitment. coss.com is self-serve SMS next to email and Verify.

Plivo is a communications API with voice, SIP trunking and voice AI agents next to SMS, MMS and WhatsApp. Its SMS is provisioned by its sales team with a minimum monthly commitment, for businesses messaging under their own brand. coss.com does SMS only, on a self-serve plan, with US registration from one form and the same API key, webhooks and logs as email.

Facts about Plivo checked on 2026-11-03 against the sources listed below.

## At a glance

| | coss.com | Plivo |
| --- | --- | --- |
| Getting access | Self-serve: live SMS on paid plans, which start at $25/month, all of it spendable on usage | Through sales, with a minimum monthly commitment across Plivo products: USD 1,000 for the US, Canada, UK, Australia, India (ILDO routes) and countries without pre-approval; USD 10,000 adds pre-registration countries (Its docs say self-service SMS onboarding isn't available) |
| US price per segment | SMS (US): $0.0142 per segment; SMS (other countries): $0.022 to $0.1134 per segment, carrier fees included | $0.0077 per SMS on long and short codes, $0.0079 on toll-free, sent or received, plus carrier surcharges of $0.0035 to $0.0050 per SMS sent; volume discounts through sales (List prices) |
| Phone numbers | SMS phone numbers (local): $1.15 per number-month; SMS phone numbers (toll-free): $2.15 per number-month | Long code $0.50 a month, toll-free $1 a month; US short code $1,500 to set up plus $500 a month |
| US carrier registration | coss.com submits the 10DLC brand and campaign or the toll-free verification from one dashboard form; fees passed through at cost | You create the profile, brand and campaign and link numbers in the console or API; toll-free verification in the console |
| Channels | SMS | SMS, MMS and WhatsApp through one Message API (WhatsApp on its Enterprise plan, from $1,000 a month) |
| Sender types | Local and toll-free numbers (US, Canada) | 10DLC, toll-free, short codes and alphanumeric sender IDs |
| Countries | The US and Canada by default; others once you allow them, from the priced list on coss.com/pricing | Outbound to 200+ countries; inbound in the US, Canada, UK, Australia, France, Germany, Netherlands, Sweden, Austria and Belgium |
| Opt-outs | STOP suppresses the number in every live environment of the organization, START lifts it | Automatic on STOP and similar keywords, for that Plivo number or, on 10DLC, every number of the campaign |
| Voice | — | Voice API and SIP trunking; voice AI agents at $0.03 a minute excluding telephony |
| One-time codes | Verify by SMS or email: $0.05 per verification, approved ones only, with a fraud guard before anything is sent | Verify by SMS, voice or WhatsApp: no fee per verification, channel prices by country, Fraud Shield included; provisioned through sales |
| Multi-tenant platforms | One registration per organization; sub-accounts cover email only | Resellers, ISVs, aggregators and multi-tenant platforms aren't onboarded for SMS |
| Callbacks | One webhook endpoint for the sms.* events, with Standard Webhooks signatures | A callback URL per message, signed with HMAC-SHA256 in X-Plivo-Signature-V2 headers |
| Testing | Sandbox keys simulate every message, with a simulator number for each outcome | — (Not compared: see Plivo's docs) |
| SDKs | TypeScript, plus generated SDKs for Python, Go, Ruby, PHP, Java and .NET; Laravel, Rails and Django mail drivers; a CLI and an MCP server | PHP, Python, Node.js, Java, .NET, Ruby and Go |
| Also on the same API key | Email, inboxes, Verify, Hooks, Risk, Forms, Sign | Voice, WhatsApp and Verify; no email on its pricing page |

## When Plivo is the better choice

- **You need voice.** Plivo has a voice API, SIP trunking and voice AI agents. coss.com has no voice product, and Verify doesn't make calls.
- **You need MMS or WhatsApp.** Both go through Plivo's Message API. coss.com sends SMS only: no MMS, no WhatsApp.
- **You need short codes or alphanumeric sender IDs.** Short codes or your brand name as the sender where countries allow it. coss.com sends from local and toll-free numbers.
- **You send and receive outside North America.** Plivo's inbound SMS covers the UK, Australia and several European countries. coss.com's numbers are US and Canadian, so messages elsewhere come from one of those and replies come back to it.
- **You can commit to volume.** With a monthly commitment you already plan to meet, Plivo's list prices and volume discounts can come in under coss.com's rate. Compare with your own traffic.

## When coss.com is the better choice

- **No sales call or commitment.** Choose a paid plan, from $25/month, and spend its credit on usage. Plivo's docs list its smallest SMS commitment at USD 1,000 a month.
- **Registration from one form.** coss.com submits your business profile, brand, campaign or toll-free verification in order, shows each status and why a step was rejected, and passes the fees through at cost.
- **You only pay for what reached a carrier.** Failed, suppressed and canceled messages cost nothing, and carrier fees are in the rate rather than a separate surcharge per carrier.
- **SMS next to everything else.** The same API key, SDK, webhooks, logs and invoice as email, Verify and inboxes, and sandbox environments that simulate every outcome.

## Moving from Plivo

1. **Get a number and register it.** There is no importer for Plivo: the dashboard's importer covers Resend, SendGrid and Postmark, and only email. On the organization's SMS page, buy a local or toll-free number and fill in the registration form with the business details you gave Plivo. Reviews usually take a few days. (/docs/sms/senders)
2. **Swap the send call.** Plivo's src, dst and text become coss.sms.send({ from, to, body }) with E.164 numbers. coss.com takes one recipient per call, so send separately where you joined several dst numbers. Test it first with a sandbox key and the simulator's numbers. (/docs/sms/sending)
3. **Move callbacks to webhooks.** Instead of a url per message, subscribe one webhook endpoint to the sms.* events. Replies go to the number's receiving environment and arrive as sms.received. (/docs/sms/receiving)
4. **Carry over your opt-outs.** Opt-outs recorded at Plivo don't follow you. Add the numbers you must not text with coss.sms.suppressions.add() before your first live send. (/docs/sms/sending)

## Frequently asked questions

### Is there an importer for Plivo?

No. The dashboard's importer covers email from Resend, SendGrid and Postmark. From Plivo, buy and register a number on coss.com, swap your send call, move callbacks to webhooks and add your opt-outs as suppressions.

### Can coss.com make voice calls or send WhatsApp messages?

No. coss.com sends and receives SMS only, with no voice, MMS or WhatsApp. Plivo has all three.

### Do I need a monthly commitment for SMS on coss.com?

No more than a paid plan, whose fee is credit spent on usage. Numbers and US carrier registration fees are billed on the same invoice. See coss.com/pricing.

### Does coss.com register my numbers for A2P 10DLC?

Yes. Owners and admins fill in one form on the organization's SMS page, and coss.com submits the business profile, brand and campaign (or the toll-free verification) and passes the carrier fees through at cost.

### Which provider sends coss.com's SMS?

Twilio, with one subaccount per organization. coss.com handles the numbers, the registration, opt-outs, billing and webhooks around it.

## Sources

- [Plivo docs: SMS availability and coverage](https://www.plivo.com/docs/messaging/sms-availability)
- [Plivo pricing](https://www.plivo.com/pricing/)
- [Plivo SMS pricing (US)](https://www.plivo.com/sms/pricing/us/)
- [Plivo docs: US messaging](https://www.plivo.com/docs/faq/messaging/us-messaging)
- [Plivo docs: 10DLC registration](https://www.plivo.com/docs/messaging/a2p-10dlc/registration-process)
- [Plivo docs: Message API](https://www.plivo.com/docs/messaging/api/messages)
- [Plivo docs: Messaging API FAQ](https://www.plivo.com/docs/faq/messaging/messaging-api)
- [Plivo docs: supported features](https://www.plivo.com/docs/messaging/concepts/features)
- [Plivo docs: opt-outs (DND)](https://www.plivo.com/docs/messaging/concepts/dnd-service)
- [Plivo docs: signature validation](https://www.plivo.com/docs/messaging/concepts/signature-validation)
- [Plivo Voice](https://www.plivo.com/voice/)
- [Plivo Verify pricing](https://www.plivo.com/verify/pricing/)
- [Plivo docs: Verify availability](https://docs.plivo.com/docs/programmable-api/verify/availability)
- [Plivo docs: server SDKs](https://www.plivo.com/docs/voice/concepts/terminology)