Inboxroad
Inboxroad is an Amsterdam-based email delivery infrastructure and marketing platform offering SMTP relay, Email API, and campaign management tools to SaaS, e-commerce, and marketing businesses, routing approximately 120 million emails per week with a 96.1% inbox delivery rate.
- Company typePrivate
- Founded2012
- HeadquartersAmsterdam, Netherlands
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Inboxroad does
Inboxroad B.V. is an Amsterdam-based email delivery and marketing platform founded in 2012, providing both infrastructure (SMTP relay and Email API) and a full campaign management suite to businesses sending high volumes of email. The core technology is built on PowerMTA servers with proprietary warm-up algorithms, provider-aware throttling (Gmail, Microsoft, Yahoo), DKIM key management, TLS encryption, and an HMAC SHA-256 secured webhook layer; the company reports routing approximately 120 million emails per week for customers across 15+ countries, with a 96.1% average inbox delivery rate (97.1% median over the last 90 days). The product portfolio covers SMTP relay, Email API, dedicated IPs, drag-and-drop and HTML editors, templates, contact lists, segmentation, suppression management, campaign statistics, user engagement tracking, per-domain sending statistics/SMTP logs, and an integration layer connecting to Shopify, WooCommerce, Zapier, HubSpot, Salesforce, Pipedrive, MailWizz, Ongage, Stripe, and 15+ other platforms.
Inboxroad operates a hybrid go-to-market combining a self-serve free trial (1,000 emails/month) with sales-assisted demos booked through a Partnership Manager; revenue is generated through monthly subscription plans (e.g., the Email plan at €59/month for 10,000 emails) plus usage-based overage charges at the same CPM rate, with tiered SMTP delivery plans, dedicated IP add-ons at €39/month, and extra-domain add-ons at €10/month. The customer base is primarily European SMBs in SaaS, e-commerce, and marketing, with selective enterprise wins in fintech (Paylane) and healthcare (MedHealth). The team is small (1-10 employees per the firmographic record and approximately 10 named on the team page), the company is privately held with no disclosed funding rounds, and operations remain bootstrapped from the Amsterdam headquarters at De Lairessestraat 130, 1075 HL Amsterdam.
Inboxroad firmographics
Firmographics- Name
- Inboxroad
- Legal name
- Inboxroad B.V.
- Website
- https://inboxroad.com
- Company type
- Private
- Founded year
- 2012
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Inboxroad is an Amsterdam-based email delivery infrastructure and marketing platform offering SMTP relay, Email API, and campaign management tools to SaaS, e-commerce, and marketing businesses, routing approximately 120 million emails per week with a 96.1% inbox delivery rate.
- Ownership category
- akta.pro rank
Inboxroad industry classification
Industry- Product category
- Email Delivery & Marketing Platform
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370), Services-Prepackaged Software (7372)
- akta.pro primary industry
- Email Marketing Services (Campaigns, Deliverability, Lifecycle) (BPAFAKAB)
- akta.pro secondary industry
- Email Authentication & Domain Protection (DMARC/SPF/DKIM) (HDADAKAC)
Keywords
Where Inboxroad is headquartered
LocationHeadquarters
- HQ city
- Amsterdam
- HQ country
- Netherlands
- HQ region
- Europe
Offices1 record
Markets served
Inboxroad business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Infrastructure, Personnel, Technology or R&D, Marketing or Sales, Operations
Revenue model
- Email Campaign Plans: Subscription-based plans (Email, Email Pro) with monthly billing. Includes campaign builder, templates, contact lists, segmentation, and analytics. Extra IPs at €39/month, extra domains at €10/month.
- SMTP Delivery Plans: Monthly subscription for SMTP relay with dedicated IPs included by tier, domain statistics, webhooks, and email support. Volume-based tiers.
- Overage Charges: When email volume exceeds plan limits, charged at same CPM rate as current plan. Scales up to 300M+ emails/month for high-volume needs.
- Free Trial Credits: 1,000 free emails per month for new accounts to test the service before committing to paid plans.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | SMTP Relay - Reliable email delivery |
| Subscription | Monthly | Email - Beautiful email campaigns |
| Subscription | Monthly | Email Pro - Powerful campaigns at scale |
| Freemium | Monthly | Free Trial |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Inboxroad product offering
Product offeringCore offering
Inboxroad provides an email delivery infrastructure and email marketing platform, combining an SMTP Relay, a REST Email API, and a full-featured Email Campaigns suite (drag-and-drop builder, templates, HTML editor, personalisation, contact lists, segmentation, suppression, real-time analytics, webhooks, and dedicated IPs). It targets businesses that need high inbox placement for transactional and marketing email, and routes approximately 120 million emails per week with a 96.1% average inbox delivery rate.
Product overview
Inboxroad is an email marketing platform and SMTP infrastructure provider offering a unified product portfolio that combines core sending services (SMTP Relay, Email API, Dedicated IPs) with campaign management tools (Email Builder, Templates, HTML Editor, Personalisation, Contact Lists, Segmentation, Suppression, Campaign Statistics, User Engagement, Domain Statistics, and Webhooks). The platform is designed for businesses sending high volumes of email, routing approximately 120 million emails weekly with a 96.1% inbox delivery rate. The architecture combines SMTP infrastructure delivery services with a full-featured email campaign platform for both marketing and transactional communications.
Differentiator
Problem solved
Functional benefit
Products and services
- SMTP Relay Email delivery infrastructure that routes customer email through Inboxroad's authenticated SMTP servers with SPF/DKIM/DMARC support, automated warm-up, provider-aware throttling, dedicated IP options, real-time monitoring, and 24/7 human deliverability support. Targets SaaS businesses, e-commerce brands, marketing platforms, and high-volume senders that need reliable inbox placement.
- Email API REST API over HTTPS that lets developers send transactional and marketing emails from applications using clean JSON requests/responses, with API token authentication, TLS security, and webhooks for real-time delivery, bounce, complaint, open, and click events. Targets engineering and product teams at SaaS and e-commerce companies.
- Dedicated IPs Exclusive IP addresses offered as a paid add-on to SMTP and Email Pro customers, with independent sender reputation, automated warm-up schedules, stream separation between transactional and marketing mail, and provider-aware pacing for Gmail, Microsoft, and Yahoo. Targeted at high-volume and enterprise senders needing reputation isolation.
- Email Campaigns Platform Subscription email marketing platform (Email and Email Pro plans) for creating, sending, and analysing marketing campaigns. Includes drag-and-drop Email Builder, templates, HTML editor, personalisation, contact lists, dynamic segmentation, automatic suppression, real-time campaign and per-user analytics, domain statistics, and webhooks. Targets SMB and mid-market businesses running newsletters and customer engagement campaigns.
Quantifiable outcome
- 96.1% average inbox delivery rate
- +4 more outcomes
Companies that use Inboxroad
Customer profileNamed customers9 records
Segments5 records
Ideal customer profiles4 records
Inboxroad technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration23 records
Feature13 records
Inboxroad partnerships and signals
Strategic signalPartnerships
13 partnerships are on record, tiered core.
- MailWizzcoreNative integration allowing MailWizz campaigns to route via Inboxroad SMTP with DKIM-signed, Return-Path aligned, inbox-first delivery. Full setup documentation provided.
- OngagecoreKeep Ongage's automations while sending through Inboxroad SMTP with dedicated IPs and clean bounce handling. Full setup documentation available.
- Warmy.iocoreWarm up new domains and IPs on automated schedule to boost Inboxroad sending reputation. Native integration available.
- ShopifycoreConnect Shopify store to Inboxroad and turn every order, abandoned cart and customer action into an email campaign.
- WooCommercecoreSync WooCommerce store with Inboxroad and turn every order, cart and customer action into automated email campaigns.
- ZapiercoreConnect Inboxroad to 6,000+ apps via Zapier and automate email workflows without writing code.
- Make.comcoreAutomate email workflows by connecting Inboxroad with thousands of apps through Make's flexible no-code integrations.
- BouncercoreVerify contacts automatically with Bouncer and improve deliverability. Export verified emails directly to Inboxroad contact lists.
- HubSpotcoreSync HubSpot contacts with Inboxroad and send campaigns with the deliverability CRM data deserves.
- SalesforcecoreActivate Salesforce data in Inboxroad to deliver personalized and automated email campaigns at scale.
- StripecoreTurn Stripe payments and subscription events into automated and personalized email campaigns with Inboxroad.
- WordPresscoreCapture leads and user activity from WordPress site and turn them into automated email campaigns with Inboxroad.
- ValiditycorePartnership for Validity Sender Certification program. Inboxroad helps clients through certification process with Validity Everest platform to gain preferential treatment from Gmail, Yahoo, Microsoft.
Scale indicators7 records
Recent moves6 records
Expansion highlights6 records
Inboxroad competitors and assessment
Company assessmentDirect peers
- Postmark: Postmark (owned by ActiveCampaign) focuses on transactional email delivery with strong deliverability and developer APIs, closely overlapping with Inboxroad's transactional SMTP/API and deliverability positioning.
- SMTP.com: SMTP.com offers SMTP relay and email delivery with dedicated IPs and deliverability support aimed at high-volume senders, directly comparable to Inboxroad's SMTP Relay and Email API offering.
- SparkPost: SparkPost provides cloud email delivery with APIs, SMTP, dedicated IPs, and analytics for transactional and marketing email at scale, directly comparable to Inboxroad's infrastructure-plus-campaign product mix.
- Twilio SendGrid: Twilio SendGrid is a leading email API and SMTP service with marketing campaigns and dedicated IPs, targeting the same developer/SaaS/e-commerce customers and overlapping with Inboxroad's SMTP and campaign products.
- Mailgun: Mailgun (owned by Sinch) provides transactional and marketing email APIs plus SMTP relay with dedicated IPs and deliverability tools, directly competing with Inboxroad's SMTP Relay and Email API products for developer and high-volume senders.
- Mailjet: Mailjet (owned by Sinch) offers transactional and marketing email via API and SMTP with dedicated IPs and deliverability features, directly comparable to Inboxroad's SMTP and campaign product set for SMB and mid-market senders.
Broad incumbents
- Amazon SES: Amazon Simple Email Service is a hyperscale cloud email sending platform bundled into AWS, competing broadly with Inboxroad on SMTP/API delivery for high-volume transactional and marketing senders at often lower unit economics.
- Brevo: Brevo (formerly Sendinblue) is a broader CRM and marketing platform combining email, SMS, and marketing automation, competing with Inboxroad's campaign tools while operating at a larger scale and broader scope.
Emerging players
- Mailersend: Mailersend is an email API/SMTP and transactional email service from MailerLite targeting developers and SMBs with competitive pricing, overlapping with Inboxroad's developer and SMB value proposition.
- Mailtrap: Mailtrap provides email sending infrastructure (SMTP/API) plus testing and validation tools targeted at developers, overlapping with Inboxroad's developer-focused Email API and SMTP delivery.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
Inboxroad social profiles
Digital presenceInboxroad compliance and trust
Trust signalCompliance2 records
Inboxroad financial estimates
Financial estimateRevenue estimate
Valuation estimate
Inboxroad leadership team
Management profileNumber of profiles
Profiles7 records
Inboxroad funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Inboxroad M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Inboxroad
What does Inboxroad do?
Inboxroad provides an email delivery infrastructure and email marketing platform, combining an SMTP Relay, a REST Email API, and a full-featured Email Campaigns suite (drag-and-drop builder, templates, HTML editor, personalisation, contact lists, segmentation, suppression, real-time analytics, webhooks, and dedicated IPs). It targets businesses that need high inbox placement for transactional and marketing email, and routes approximately 120 million emails per week with a 96.1% average inbox delivery rate.
Is Inboxroad a public or private company?
Inboxroad is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Inboxroad founded?
Inboxroad was founded in 2012. It employs 1 to 10 people.
Where is Inboxroad based?
Inboxroad is headquartered in Amsterdam, Netherlands, in the Europe region.
How does Inboxroad make money?
Four revenue lines are on record. Email Campaign Plans are the primary driver. The others are SMTP Delivery Plans, overage Charges and free Trial Credits.
Who are Inboxroad's main competitors?
Direct peers on record are Postmark, SMTP.com, SparkPost, Twilio SendGrid, Mailgun and Mailjet. Broad incumbents are Amazon SES and Brevo. Emerging players are Mailersend and Mailtrap.
Does Inboxroad have an API?
Yes. Inboxroad offers a REST API over HTTPS with clean JSON requests and responses. The API enables sending transactional and marketing emails, triggering automations, and tracking results. It supports API tokens for authentication, TLS for security, and webhooks for real-time events (deliveries, bounces, complaints, opens, clicks). SMTP relay is also available via smtp.deliverabilitymanager.net on port 587 with STARTTLS authentication. Developer documentation is at webapi.inboxroad.com/overview.
What industry is Inboxroad in?
Inboxroad's product category is Email Delivery & Marketing Platform. Its primary akta.pro industry code is BPAFAKAB, Email Marketing Services (Campaigns, Deliverability, Lifecycle), with a secondary code of HDADAKAC, Email Authentication & Domain Protection (DMARC/SPF/DKIM). Its NAICS code is 518 and its SIC code is 7370.