Contents
Brevo (formerly Sendinblue, rebranded May 2023) is all-in-one marketing platform combining email campaigns, transactional email, SMS marketing, CRM functionality, automation workflows, and landing pages with pricing from free tier through $65/month for moderate volume. Mailgun is developer-focused transactional email API owned by Sinch with comprehensive deliverability tooling, deep API capabilities including email parsing and routing, and pricing from $35/month Foundation tier (50K emails) to higher tiers for substantial volume. The 2026 operator decision is rarely a direct Brevo-versus-Mailgun comparison but rather a category-fit question: SMBs needing marketing plus transactional in single platform choose Brevo; technical teams needing dedicated transactional infrastructure choose Mailgun (or Postmark, SendGrid Transactional, Amazon SES). Many operations use both for different layers of email infrastructure.
This comparison covers the practical Brevo vs Mailgun decision in 2026: the fundamental category difference between all-in-one marketing platform and developer transactional API, Brevo's evolution from Sendinblue rebrand and comprehensive suite positioning, Mailgun's Sinch ownership and developer-focused infrastructure, pricing structures favouring different operator profiles, deliverability comparison showing both produce acceptable outcomes when configured properly, developer experience comparison favouring Mailgun substantially, marketing capabilities exclusive to Brevo, the hybrid architecture pattern combining both for different infrastructure layers, and the decision framework based on operational profile and integration requirements.
A category clarification
Different categories. Different operator profiles. Different value propositions.
Brevo and Mailgun appear in same comparison conversations because both handle transactional email, but the products occupy fundamentally different categories. Understanding the category difference clarifies which platform fits which operational need.
Brevo category: all-in-one marketing platform with transactional email. Comparable products include Mailchimp, Constant Contact, GetResponse, MailerLite. These platforms target small to medium businesses needing comprehensive marketing capability in single subscription. Transactional email is one capability among many marketing tools.
Mailgun category: dedicated transactional email API. Comparable products include SendGrid Transactional, Postmark, Amazon SES, MailerSend, SparkPost. These platforms target developers and technical teams needing email delivery infrastructure without marketing features. Pure focus on transactional sending depth.
The category overlap exists only in transactional email where both platforms compete; the category divergence shows in everything else where Brevo extends substantially into marketing territory Mailgun does not address.
Common operational scenarios:
SMB needing marketing + transactional in one platform. Brevo typically wins through comprehensive feature set; one subscription handles marketing campaigns, automation, transactional, CRM, SMS.
Developer needing pure transactional infrastructure. Mailgun typically wins through API depth, parsing capabilities, routing rules, webhooks, validation tools.
Both layers needed at scale. Hybrid pattern using Brevo for marketing and Mailgun for transactional at substantial volume; common in growing operations with both layers important.
Marketing operations with simple transactional needs. Brevo's transactional adequate for confirmation emails, password resets, order notifications; no need for Mailgun's depth.
High-volume transactional operations. Mailgun's infrastructure depth becomes meaningful at million+ monthly transactional emails; Brevo less optimised for this scale.
The platform choice should reflect operational scope rather than feature comparison within transactional alone. Operations needing only transactional consider Mailgun against other transactional specialists; operations needing marketing plus transactional consider Brevo against other marketing platforms.
Brevo overview
Brevo has specific characteristics matching its all-in-one marketing positioning.
Sendinblue rebrand to Brevo. The platform rebranded from Sendinblue to Brevo in May 2023; reflecting positioning as comprehensive customer engagement platform beyond just email; some operators still refer to the platform by previous name.
Email marketing campaigns. Comprehensive email marketing with drag-and-drop builder; template library; subscriber management; segmentation; A/B testing; analytics. Core capability for marketing email operations.
Transactional email. Included as add-on to platform; free tier provides 300 daily transactional emails; paid transactional tier starts $15/month for 20,000 emails; API and SMTP integration.
SMS marketing. Integrated SMS marketing campaigns; transactional SMS supported; unified contact management across email and SMS.
CRM functionality. Built-in CRM with contact management, deal tracking, pipeline visualisation; integration with email and SMS marketing; appropriate for SMB CRM needs.
Marketing automation. Workflow builder for behaviour-triggered campaigns; conditional logic; multi-channel automation including email and SMS.
Landing pages. Built-in landing page builder; templates; A/B testing; integration with email campaigns for lead capture and conversion tracking.
Live chat. Brevo Conversations provides website chat with team inbox; integration with CRM and email platform.
Email deliverability expertise. 10+ years deliverability experience; actively managed sender reputations; global deliverability team; dedicated IPs for large senders.
SDKs and integrations. Official SDKs for multiple programming languages; integrations with major platforms including Shopify, WordPress, Zapier, Salesforce.
Brevo 2026 pricing structure:
| Plan tier | Pricing | Key features |
|---|---|---|
| Marketing Free | $0 | 300 emails/day, unlimited contacts, basic features |
| Marketing Starter | ~$9-25/month | From 20K-100K emails/month, no daily limit |
| Marketing Business | ~$15-65/month | Advanced features, marketing automation, A/B testing |
| Marketing Enterprise | Custom | Custom volumes, advanced support, dedicated IPs |
| Transactional Free | $0 (with paid marketing) | 300 transactional emails/day |
| Transactional Paid | From $15/month | 20K transactional emails, scaling tiers |
Brevo strengths. All-in-one marketing platform value; comprehensive feature set in single subscription; affordable pricing relative to comparable all-in-one platforms; transactional included as add-on; SMS marketing native; SMB-friendly interface; deliverability expertise.
Brevo limitations. Transactional email less specialised than dedicated providers; developer experience adequate but not as deep as Mailgun; advanced features locked behind higher tiers; not optimised for high-volume transactional operations; less granular API control.
Mailgun overview
Mailgun has different characteristics matching its developer-focused transactional positioning.
Sinch ownership. Mailgun owned by Sinch following acquisition; part of Sinch's communication platform portfolio alongside SMS, voice, video, verification APIs; provides enterprise positioning and resource access.
Transactional email API specialisation. Pure focus on transactional email infrastructure; comprehensive APIs covering sending, receiving, parsing, routing, validation, analytics; no marketing platform features.
Developer-grade APIs. RESTful API with comprehensive documentation; SDKs for multiple languages (Python, PHP, Ruby, Node.js, Java, others); webhook support for event-driven workflows.
Email parsing and routing. Inbound email processing with parsing into structured data; routing rules based on incoming email criteria; uniquely capable feature for applications requiring email-to-database workflows.
Deliverability tooling depth. Inbox placement testing; reputation monitoring; granular delivery analytics; pre-send quality assurance; bounce categorisation; complaint feedback loops; comprehensive deliverability platform beyond simple sending.
Email validation API. Validate email addresses before sending; reduces bounce rates; improves deliverability; pay-per-validation pricing at $1 per 1,000 validations on Flex plan.
Dedicated IPs on higher tiers. Foundation and Scale plans include dedicated IPs for reputation isolation; automated IP warmup process.
SMTP and HTTP API. Both SMTP relay and HTTP API supported; flexibility for different integration patterns; SMTP suitable for legacy applications; HTTP API for modern applications.
Inbound processing. Receives email at Mailgun-controlled addresses; parses content into structured data via webhook; useful for applications needing email-to-action workflows.
Mailjet for marketing. Sister Sinch product Mailjet provides email marketing capabilities; separate subscription required if marketing email needed alongside Mailgun transactional.
Mailgun 2026 pricing structure:
| Plan tier | Monthly pricing | Volume included | Key features |
|---|---|---|---|
| Flex | Pay-as-you-go | 1,000 free monthly, then per-email pricing | Standard API access |
| Foundation | ~$35/month | 50,000 emails | Dedicated IP, deliverability suite, analytics |
| Scale | ~$90+/month | 100,000 emails | Advanced deliverability, priority support |
| Enterprise | Custom | Million+ emails | Custom infrastructure, dedicated success team |
| Validation API | $1 per 1,000 validations | Pay-as-you-go | Email validation |
Mailgun strengths. Developer-grade API depth; email parsing and routing unique among major providers; comprehensive deliverability tooling; dedicated IPs in standard tiers; granular analytics; SMTP plus HTTP API flexibility; Sinch ecosystem integration potential.
Mailgun limitations. No marketing platform features (requires separate Mailjet subscription); pricing premium relative to Brevo for equivalent transactional volume; complexity overkill for simple transactional needs; less appropriate for non-developer operators.
Pricing comparison
Detailed pricing comparison across operational scenarios:
| Operational scenario | Brevo cost/month | Mailgun cost/month | Comparison |
|---|---|---|---|
| Tiny operation: under 1K monthly transactional | $0 (free tier) | $0 (1K free monthly Flex) | Both free |
| Small: 20K transactional monthly | $15 transactional addon | $15 estimated (Flex pricing) | Comparable |
| Moderate: 50K transactional monthly | $25-35 transactional | $35 Foundation | Brevo slightly cheaper |
| Growing: 100K transactional monthly | $45-65 transactional | $75-90 Scale | Brevo cheaper |
| SMB needing marketing + transactional 100K total | $45-65 (includes marketing features) | $75 transactional + Mailjet for marketing (additional cost) | Brevo substantially cheaper for combined |
| Mid-scale 500K transactional monthly | ~$200/month with custom | ~$200-300/month Scale or Custom | Similar pricing |
| Enterprise 5M+ monthly transactional | Custom Brevo | Mailgun Enterprise custom | Depends on specific needs |
Pricing pattern observations:
Comparable at small scale. Both platforms competitive for small operations; Brevo's free tier of 300 daily emails sufficient for many small operations; Mailgun's pay-as-you-go also accommodates small volume.
Brevo cheaper for SMB volumes. Mid-volume operations (50K-500K monthly) find Brevo's transactional pricing more economical than Mailgun for equivalent volume.
Brevo dramatically cheaper for combined marketing + transactional. Operations needing both layers find Brevo's all-in-one model substantially cheaper than Mailgun plus Mailjet combination.
Mailgun premium reflects specialisation. Mailgun's higher pricing reflects deliverability tooling depth, parsing capabilities, dedicated IPs at lower tiers; operations needing these capabilities find the premium justified.
Enterprise pricing similar. At enterprise scale custom pricing both platforms negotiate based on specific needs; differentiation comes from feature fit rather than pricing.
Deliverability comparison
Deliverability comparison reveals comparable outcomes with different operational strengths.
| Deliverability feature | Brevo | Mailgun |
|---|---|---|
| Inbox placement (configured properly) | 95%+ | 95%+ |
| Authentication (SPF, DKIM, DMARC) | Standard support | Standard support with deeper validation |
| Custom sending domain | Yes | Yes |
| Dedicated IP availability | Large senders, higher tiers | Foundation and Scale tiers |
| IP warmup | Automated | Automated |
| Inbox placement testing | Limited | Comprehensive pre-send QA testing |
| Reputation monitoring | Standard dashboard | Granular metrics with detailed analytics |
| Bounce processing | Automated categorisation | Automated categorisation with detailed reasons |
| Email validation pre-send | Basic | Comprehensive validation API ($1/1,000) |
| Deliverability team | Global team, 10+ years experience | Expert team, Sinch resources |
| Compliance certifications | GDPR, ISO standards | SOC 2, GDPR, HIPAA available |
| Suppression management | Standard | Granular suppression with categories |
Deliverability observations:
Both produce strong inbox placement. Both platforms achieve 95%+ inbox placement when configured properly; the deliverability difference is marginal for typical operations.
Mailgun deliverability tooling depth. Pre-send inbox placement testing; granular analytics; comprehensive validation; deeper deliverability platform for operators wanting detailed control.
Brevo deliverability adequate. Managed sender reputation; experienced deliverability team; sufficient for SMB and moderate enterprise operations.
Configuration quality matters more than platform. Both platforms produce acceptable deliverability when properly configured; both produce problems when misconfigured; the platform choice rarely fixes deliverability issues alone.
Authentication requirements identical. SPF, DKIM, DMARC required for proper deliverability on both platforms; standard authentication patterns apply.
Developer experience
Developer experience comparison reveals substantial Mailgun advantage.
Mailgun developer experience strengths:
- Comprehensive API documentation. Mature developer documentation with clear examples; code samples in multiple languages; tutorials for common use cases.
- SDKs for multiple languages. Official SDKs for Python, PHP, Ruby, Node.js, Java, Go, C#; idiomatic libraries simplifying integration.
- Webhook support. Detailed webhook events for all email lifecycle stages; signature verification; retry logic.
- Email parsing API. Inbound email processing into structured data; unique capability among major providers.
- Routing rules. Programmable routing based on email criteria; advanced inbound handling.
- Validation API. Email address validation before sending; integration with sending workflows.
- SMTP and HTTP API. Both integration patterns supported; flexibility for different application architectures.
- Detailed logs and analytics. Per-email logs accessible via API; granular event tracking; queryable analytics.
Brevo developer experience:
- SMTP and API integration. Standard transactional email APIs; SMTP relay supported; sufficient for typical transactional needs.
- Official SDKs. SDKs for multiple languages including PHP, Python, JavaScript, Ruby; covering main platform operations.
- Webhook support. Standard webhooks for email events; less granular than Mailgun.
- Wizard integrations. Setup wizards for Postfix, PHP, and other common integrations; helpful for less technical users.
- Limited advanced features. No native email parsing or routing rules; less suitable for sophisticated email infrastructure needs.
Example transactional send via Mailgun API:
// Mailgun Node.js example
const formData = require('form-data');
const Mailgun = require('mailgun.js');
const mailgun = new Mailgun(formData);
const mg = mailgun.client({
username: 'api',
key: process.env.MAILGUN_API_KEY
});
mg.messages.create('mail.example.com', {
from: 'notifications@mail.example.com',
to: ['customer@example.com'],
subject: 'Order confirmation',
text: 'Thank you for your order',
html: '<p>Thank you for your order</p>',
'h:X-Order-ID': '12345',
'o:tracking': 'yes'
})
.then(msg => console.log(msg))
.catch(err => console.error(err));
Example transactional send via Brevo API:
// Brevo Node.js example
const SibApiV3Sdk = require('sib-api-v3-sdk');
const defaultClient = SibApiV3Sdk.ApiClient.instance;
const apiKey = defaultClient.authentications['api-key'];
apiKey.apiKey = process.env.BREVO_API_KEY;
const apiInstance = new SibApiV3Sdk.TransactionalEmailsApi();
const sendSmtpEmail = new SibApiV3Sdk.SendSmtpEmail();
sendSmtpEmail.sender = {
email: 'notifications@example.com',
name: 'Example Company'
};
sendSmtpEmail.to = [{ email: 'customer@example.com' }];
sendSmtpEmail.subject = 'Order confirmation';
sendSmtpEmail.htmlContent = '<p>Thank you for your order</p>';
sendSmtpEmail.textContent = 'Thank you for your order';
apiInstance.sendTransacEmail(sendSmtpEmail)
.then(data => console.log(data))
.catch(err => console.error(err));
The code examples show similar transactional sending complexity; the developer experience differences emerge in advanced scenarios involving parsing, routing, validation, and webhook handling where Mailgun's depth becomes apparent.
Marketing capabilities
Marketing capability comparison shows substantial Brevo advantage.
Brevo marketing features:
- Email marketing campaigns. Drag-and-drop builder; template library; subscriber management; segmentation; A/B testing; campaign analytics.
- Marketing automation. Workflow builder for behaviour-triggered campaigns; conditional logic; cross-channel automation.
- SMS marketing. Integrated SMS campaigns; marketing and transactional SMS support.
- Landing pages. Built-in landing page builder; templates; A/B testing.
- CRM functionality. Contact management, deal tracking, pipeline visualisation.
- Live chat. Brevo Conversations for website chat.
- Forms and lead capture. Embedded forms; pop-ups; integration with campaigns.
- Multi-channel attribution. Track engagement across email, SMS, landing pages, chat.
Mailgun marketing limitations:
- No marketing platform features. Mailgun focuses purely on email infrastructure without campaign management, automation, or marketing tools.
- Mailjet for marketing. Sister Sinch product Mailjet handles email marketing; requires separate subscription.
- No CRM, SMS, or chat. Pure transactional email focus.
- No campaign builder. Cannot send marketing campaigns through Mailgun interface.
For operations needing marketing capabilities, Mailgun simply does not address those needs. The choice between Brevo and Mailgun for marketing operations is not really a choice; Mailgun does not compete in marketing category.
The marketing capability gap is the defining feature distinction beyond pure transactional. Operations needing marketing must look elsewhere if choosing Mailgun for transactional; Brevo provides marketing natively.
Brevo's May 2023 rebrand from Sendinblue created some operational confusion that persists into 2026. Older documentation, comparison articles, and integration guides still reference Sendinblue rather than Brevo; the legacy name appears in URLs, configuration files, and third-party integrations. Operators evaluating Brevo encounter inconsistent naming where the same platform appears under both names depending on source. The rebrand reflects positioning evolution: Sendinblue marketing emphasised email marketing focus; Brevo positioning emphasises customer engagement platform breadth including SMS, CRM, conversations. The technical platform continues without disruption; existing Sendinblue accounts migrated to Brevo identity; API endpoints continue functioning under both naming conventions during transition period. For operators encountering Sendinblue references in 2026 documentation: treat it as historical reference to Brevo; functionality and pricing have evolved but core capabilities remain consistent. The rebrand created marketing momentum but also lasting documentation fragmentation; verify current Brevo pricing and features from official Brevo sources rather than relying on older Sendinblue comparison material.
Hybrid architecture pattern
Hybrid architecture combining Brevo for marketing and Mailgun for transactional is common in growing operations.
The pattern: use Brevo for email marketing campaigns, automation workflows, CRM, SMS marketing; use Mailgun for high-volume transactional email where API depth and deliverability tooling matter operationally.
Implementation requirements:
- Separate sending domains. Marketing through news.brand.com via Brevo; transactional through mail.brand.com via Mailgun; isolation prevents reputation cross-contamination.
- SPF includes both sending sources. SPF record covers both Brevo and Mailgun sending infrastructure.
- DKIM signing aligned per domain. Each subdomain has its own DKIM keys aligned with the platform sending from that subdomain.
- DMARC policy coordinated. DMARC applies to both subdomains; consistent enforcement.
- Integration points coordinated. CRM data may need synchronisation between Brevo and Mailgun; webhook integrations may need to update multiple systems.
Cost implications:
For moderate operations sending 50K marketing emails and 50K transactional emails monthly: Brevo Marketing Business at approximately $45/month covers marketing including transactional; Mailgun Foundation at $35/month covers transactional. Total monthly cost: $80/month combined versus $45/month Brevo alone or $35/month Mailgun alone (without marketing). The hybrid cost premium of $35/month justified when both platforms deliver operational value through specialisation.
For larger operations: combined cost grows substantially; specialised platforms produce better outcomes than trying to use single platform for both layers.
Decision factors for hybrid architecture:
- Marketing email volume substantial. Operations sending 50K+ marketing emails monthly benefit from Brevo's marketing platform depth.
- Transactional volume substantial. Operations sending 100K+ transactional emails monthly benefit from Mailgun's specialised infrastructure.
- Distinct operational teams. Marketing team uses Brevo; engineering team uses Mailgun; clean separation by team responsibility.
- Reputation isolation valuable. Marketing campaigns and transactional emails on different infrastructure prevent cross-contamination.
A B2B SaaS startup client we worked with through 2024-2025 illustrates the typical Brevo plus Mailgun hybrid pattern at moderate scale. They had been running both marketing and transactional through Brevo (then Sendinblue) at approximately $45/month covering 80K monthly emails total. As transactional volume grew (driven by product usage), they encountered limitations: Brevo's transactional analytics insufficient for engineering debugging; webhook delivery less granular than needed; email parsing requirement for support ticket workflows not addressed by Brevo. We implemented hybrid architecture: kept Brevo Marketing Business at $45/month for email marketing, automation workflows, CRM, and SMS; added Mailgun Foundation at $35/month for transactional email at 150K monthly volume with deeper analytics, webhook reliability, and email parsing for support workflows; configured separate sending subdomains (news.example.com for marketing through Brevo; mail.example.com for transactional through Mailgun); aligned SPF, DKIM, DMARC across both. Implementation timeline: 4 weeks for infrastructure setup, domain configuration, parallel testing, gradual cutover for transactional. Post-implementation results: transactional reliability improved through Mailgun's analytics and webhook granularity; marketing operations continued unchanged on Brevo; support workflow automated through Mailgun's email parsing API; total monthly cost $80 versus single-platform $45 produced $420 annual overhead but enabled product features impossible on single platform. The lesson: growing SaaS operations frequently outgrow all-in-one platforms for specific layers; hybrid architectures combining specialised platforms produce better outcomes than forcing all use cases through single platform; the cost overhead is real but typically justified by operational improvements and feature enablement.
Decision framework
The decision framework for Brevo vs Mailgun in 2026:
Choose Brevo when: SMB needing all-in-one marketing platform with email + SMS + CRM + automation + landing pages; transactional email needs are simple (confirmations, password resets, notifications); budget-conscious operation wanting comprehensive feature set in single subscription; non-developer team preferring visual interfaces over API-heavy workflows; combined marketing and transactional volume moderate (under 500K monthly).
Choose Mailgun when: developer-focused operation needing dedicated transactional email API; email parsing and routing rules required for application workflows; substantial transactional volume (100K+ monthly) justifying specialisation; deliverability tooling depth important operationally; technical team comfortable with API-heavy operations; no marketing platform needs (or using separate marketing platform).
Use hybrid Brevo + Mailgun when: need both robust marketing platform and high-volume transactional infrastructure; budget supports dual subscriptions; operational specialisation justifies platform separation; distinct marketing and engineering teams; reputation isolation between marketing and transactional valuable.
Consider alternatives when: Mailchimp or Constant Contact may suit marketing-only operations preferring those platforms; Postmark suits operations wanting transactional with strict deliverability focus; SendGrid offers both transactional and marketing in single platform (alternative to Brevo plus Mailgun); Amazon SES suits high-volume transactional with AWS infrastructure integration; Klaviyo suits ecommerce marketing with native Shopify integration.
Stay on current platform when: existing platform produces acceptable outcomes; migration cost would exceed benefits; team expertise represents substantial investment.
The 2026 default progression for typical operators:
- Solo founder or small operation: Brevo free tier for evaluation (300 daily transactional plus marketing features)
- Small SMB needing marketing + transactional: Brevo Marketing Starter $9-25/month most economical
- Growing SMB with substantial marketing: Brevo Marketing Business $15-65/month
- Developer-focused operation with primarily transactional: Mailgun Flex pay-as-you-go or Foundation $35/month
- Growing operation with both layers significant: hybrid Brevo + Mailgun architecture
- High-volume transactional: Mailgun Scale or Enterprise tiers
- Ecommerce operation: Klaviyo may suit better than either Brevo or Mailgun for marketing
- Strict transactional with deliverability focus: Postmark alternative to Mailgun worth evaluating