Sendinblue Brevo API
Brevo publishes a self-serve REST API at api.brevo.com/v3 spanning contacts, campaigns, transactional email, SMS, WhatsApp, ecommerce, and CRM deals. Auth is a per-account API key with no partner approval. Most non-transactional endpoints cap at 100 requests per hour on lower tiers.
Frequently asked questions
Sendinblue Brevo scores A on the API Report Card. Brevo publishes a self-serve REST API at api.brevo.com/v3 spanning contacts, campaigns, transactional email, SMS, WhatsApp, ecommerce, and CRM deals. Auth is a per-account API key with no partner approval. Most non-transactional endpoints cap at 100 requests per hour on lower tiers.
Sendinblue Brevo has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Brevo (formerly Sendinblue, rebranded in May 2023) is a Paris-headquartered cloud customer engagement platform that bundles email marketing, transactional email/SMTP relay, SMS marketing, WhatsApp campaigns, marketing automation, a sales CRM, a conversations/live chat product, landing pages, signup forms, and a contact database into a single SMB and mid-market SaaS.
Vertical: Email / SMS marketing and customer engagement (horizontal SaaS, not industry-specific). Marketing teams use Brevo to build and send email campaigns and newsletters via a drag-and-drop editor, segment contacts by attributes and behavior, and run multi-step automations triggered by signups, site events, abandoned carts, purchase history, or API events.
Brevo reports 500,000+ businesses across 180 countries using the platform, ~865 employees globally, and ~€200M ARR projected for 2025 with a double-digit EBITDA margin. Holds 4.5/5 on G2 across thousands of reviews and 4.3/5 on Trustpilot.
Yes, for any business that runs lifecycle marketing or transactional email on it, Brevo is the system of record for the entire customer engagement dataset: the full contact database with custom attributes, lists, and segments; every email/SMS/WhatsApp send with delivery, open, click, bounce, spam, and unsubscribe history; every transactional email passed through the SMTP relay and API (receipts, password resets, order confirmations); every marketing automation entry/exit and step-level history; the bundled CRM (deals, pipelines, meetings, tasks, notes); ecommerce orders and product catalog synced from Shopify/WooCommerce/PrestaShop/Magento; conversations and live chat transcripts; landing page and form submissions; subscription and consent status (GDPR-relevant); and push notification and web event streams.
Founded in 2012 in Paris by Armand Thiberge as Sendinblue, originally as an email marketing and SMTP relay for small businesses. Rebranded to Brevo in May 2023 to signal the shift from email-only to full customer engagement platform.
Most non-transactional endpoints are capped at 100 requests/hour, which is extremely low for bulk syncs and CDP-style integrations. Rate limits return HTTP 429 with X-RateLimit headers but cannot be raised on lower-tier plans, breaking high-volume contact sync jobs. Full sourced list under Sources below.
Common alternatives include Mailchimp (Intuit), HubSpot, ActiveCampaign, Klaviyo, Constant Contact, GetResponse. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.