coss.com vs Brevo
Brevo is a full marketing suite with automation, CRM and chat. coss.com is a developer platform: email, SMS and one-time codes behind one API.
Brevo is built for teams running campaigns: a drag-and-drop editor, automation workflows, A/B tests, landing pages, a sales CRM, live chat and WhatsApp, with an API alongside. coss.com is built for engineers: an API and SDKs first, sandbox environments, sub-accounts for your own customers, and logs of every request and webhook. If your marketers work in the tool every day, Brevo does far more for them.
At a glance
Brevo's side was checked on against its own pages. Prices are list prices.
| Feature | coss.com | Brevo |
|---|---|---|
| Pricing model | Per recipient, with no volume tiers to pick: $0.40 per 1,000 recipients for the first 1,000,000; $0.30 per 1,000 recipients from 1,000,001 to 10,000,000; $0.22 per 1,000 recipients beyond 10,000,000. Paid plans start at $25/month, all of it spendable on usage | Plans by monthly email volume: Starter from $9/month and Standard from $18/month for 5,000 emails, Professional from $499/month for 150,000, Enterprise custom |
| Free tier | Free plan: 3,000 email recipients a month, 3,000 received emails a month and 3 inboxes; 1 sending domain | 300 emails a day (9,000 a month), with no time limit and no credit card |
| Transactional email | REST API and an SMTP relay (smtp.coss.com), batch and scheduled sends, idempotency keys, templates with versions and locales | REST API and SMTP relay, templates, up to 1,000 emails per batch request, attachments up to 25 MB per email |
| Marketing email | Contacts with custom properties, audiences, segments, topics with a hosted preference center and double opt-in, broadcasts on a separate marketing stream | Drag-and-drop editor, segmentation and forms on Starter; unlimited automation workflows, A/B testing, send time optimization and landing pages from Standard; contact scoring from Professional |
| SMS | SMS (US): $0.0142 per segment; SMS (other countries): $0.022 to $0.1134 per segment, carrier fees included; live SMS on paid plans | Prepaid credits on every plan, Free included, priced by volume and destination; campaigns, automations and an API |
| Other channels | Verify (one-time codes), Hooks (webhooks as a service) and Risk on the same API key and SDK | WhatsApp, web and mobile push, live chat, a chatbot, wallet and phone |
| CRM and sales | — | Pipelines, sales automation and chat, sold as Sales Essentials and Sales Advanced |
| Receiving email | Every environment has its own address under coss.com's inbound domain, or receive at your own domain with one MX record; an email.received webhook, content and attachments through the API | Inbound parsing: MX records on a receiving subdomain, each message posted to your URL as JSON with extracted text and attachments to download |
| Multi-tenant sending | Sub-accounts on Scale and Enterprise: each with its own domains, SES tenant, reputation, quotas and suppression list (transactional email) | Multi-account management on Enterprise: business units and brands under one master account |
| Dedicated IPs | An add-on on Scale and Enterprise: Amazon SES managed dedicated IPs, warmed up automatically | Listed on Enterprise, and optional for high-volume senders, with automated warming |
| 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 | Node.js, PHP, Python, Java, C#, Go and Ruby; 150+ integrations such as Shopify, WordPress, Stripe and Zapier |
| WebhooksBrevo's webhook reference mentions no request signature | Standard Webhooks signatures, automatic retries, test events and `coss listen` to forward events to localhost | An optional authentication token; 4 retries over about 11 hours, and most 4xx and all 5xx responses end the retries |
Which to choose
Both are good at what they do. Here is where each one fits better.
Choose Brevo when
Marketers run campaigns in the tool
Brevo has a drag-and-drop editor, automation workflows, A/B tests, send time optimization and landing pages. coss.com's marketing email is broadcasts you write and schedule, with segments and topics deciding who gets them.
You want the CRM and chat in one place
Sales pipelines, live chat, a chatbot, WhatsApp, push and loyalty programs sit next to email in Brevo. coss.com has none of those.
You send on a free plan
Brevo's free plan allows 9,000 emails a month at up to 300 a day. coss.com's includes 3,000 email recipients a month.
You work in a platform with a plugin
Brevo has 150+ integrations with tools such as Shopify, WordPress and Stripe, so a store can connect without writing code.
Choose coss.com when
Developers own your email
An API and SDKs first: idempotency keys, React Email, generated SDKs in six more languages, a CLI that forwards webhooks to localhost, and an MCP server for coding agents.
You want a real sandbox
Every project has sandbox environments whose coss_test_ keys run the same API with nothing leaving coss.com, and a simulator for email and SMS outcomes.
You send for your own customers
A coss.com sub-account gives each of your users their own domains, SES tenant, reputation, quotas and suppressions, so one bad sender pauses only itself. Available on Scale and Enterprise; sandbox sub-accounts are free.
Signed webhooks and full logs
Every webhook is signed with Standard Webhooks headers, and each environment's log holds every API request, email event and webhook attempt.
Received mail you can read later
coss.com keeps each received email, so a webhook outage loses nothing, and inboxes give AI agents their own addresses with threads and replies.
Moving from Brevo
- 1
Add and verify your domains
There is no importer for Brevo: the dashboard's importer covers Resend, SendGrid and Postmark. Add each domain in coss.com and publish its DNS records. coss.com's DKIM records sit next to Brevo's, so you can keep sending through Brevo until you switch.
Read the guide - 2
Bring over contacts and suppressions
Export your contacts from Brevo as CSV and read its blocked transactional contacts through its API. Import them with coss.email.contacts.import and coss.email.suppressions.import, or as CSV on the Contacts and Suppressions pages. An import never re-subscribes someone who unsubscribed.
Read the guide - 3
Rebuild templates and campaigns
Recreate your templates with coss.com's template language, or send HTML or React Email from your code. Lists become audiences and filters become segments. Automation workflows have no equivalent: trigger those emails from your own code.
Read the guide - 4
Switch your code and webhooks
Send with coss.email.send() or point SMTP at smtp.coss.com. Move inbound parsing to a receiving domain with coss.com's MX record, and update your handlers to coss.com's events and signatures.
Read the guide
Questions
- Is there an importer for Brevo?
- No. The dashboard's importer covers Resend, SendGrid and Postmark. From Brevo, add your domains, import contacts and suppressions through the API or as CSV, recreate your templates and switch your sending code.
- Does coss.com have marketing automation like Brevo?
- No. coss.com's marketing email is contacts, audiences, segments, topics and broadcasts you write and schedule. There are no automation workflows or A/B tests; Brevo's Standard plan has both.
- Does coss.com have a CRM or live chat?
- No. coss.com is APIs for email, SMS, one-time codes, webhooks and risk checks. If you want sales pipelines and chat with your email, Brevo includes them.
- Can I send SMS with coss.com as I do with Brevo?
- Yes, on a paid plan, from your organization's own local or toll-free numbers. coss.com buys the numbers and submits the US registrations for you. SMS is billed per segment by country rather than from prepaid credits.
- Is coss.com cheaper than Brevo?
- It depends on your volume and what you use. coss.com charges per recipient and a paid plan's fee is credit spent on usage; Brevo sells plans by email volume with marketing tools on each tier. Compare both pricing pages with your own numbers.
Sources
Brevo's facts were checked on ; their pages are the final word on their prices and features.
The coss.com side
- Marketing emailcoss.com Marketing email sends newsletters and announcements to your contacts as broadcasts, with audiences, segments, topics and a hosted preference center.
- Emailcoss.com Email is a transactional email API. Send single, batch and scheduled email from your domains, with templates, tracking and per-recipient webhooks.
- SMScoss.com SMS is an API that sends and receives text messages from your own phone numbers, with US 10DLC and toll-free registration done for you.
Try coss.com next to Brevo.
A development key costs nothing and delivers nothing, so you can compare with real code.
Add coss.com to this project: read https://coss.com/llms.txt, get a development key with `npx coss-cli init --agents`, and build and test with it.