Maildoso
Maildoso is a B2B cold email infrastructure provider, founded in 2023, that supplies outbound-focused SMTP and Google Workspace mailboxes, domain registration, and API tooling to sales teams, agencies, and developers running cold outreach at scale.
- Company typePrivate
- Founded2023
- HeadquartersGranite Bay, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Maildoso does
Maildoso (legal entity BacklinkSwappers, inc., incorporated in California) is a B2B cold email infrastructure provider founded in 2023 that supplies outbound-focused mailboxes and domains to sales teams, agencies, and developers running cold outreach campaigns. The platform offers two primary mailbox products — proprietary SMTP mailboxes starting at $0.49/month with dedicated servers, automatic IP rotation, Global Customer Domain Tracking, and 14-day burned-out mailbox recovery, and official Google Workspace mailboxes priced separately for higher deliverability to personal email providers — alongside a flat $12/year domain registration service supporting 14 TLDs. Infrastructure is differentiated by automated SPF/DKIM/DMARC configuration, three-day inbox placement testing with health scoring, CAPTCHA-protected primary domains, and an API/MCP server that exposes the full setup workflow to developers and AI assistants such as Claude.
The go-to-market is a hybrid self-serve PLG and enterprise field-sales motion: individual senders and SMBs sign up directly and configure mailboxes in under 10 minutes, while high-volume customers exceeding 10,000 mailboxes route through a Calendly-booked AE team for custom pricing. Distribution is anchored by native one-click integrations with the four dominant cold email sequencers — Instantly, Smartlead, Saleshandy, and EmailBizon — supplemented by a 1,400+ member Slack community, a 20% recurring affiliate program, a certified Experts Pool, monthly webinars, and a content-led SEO presence. The company reports 6,000+ customer companies, 400k+ managed mailboxes, and 10M+ emails sent per day, with named logos spanning enterprise (TikTok, ZoomInfo, Deel), mid-market (Woodpecker, Apollo, Cognism), and SMB agencies.
Revenue mechanics are entirely subscription-based: monthly mailbox licenses, quarterly SMTP bundles with included domains, annual domain registrations, custom multi-year enterprise contracts above 10,000 mailboxes, and a recurring affiliate commission layer. The company is privately held, has no disclosed funding rounds or institutional investors, and operates with 11–50 employees.
Maildoso firmographics
Firmographics- Name
- Maildoso
- Legal name
- BacklinkSwappers, inc.
- Website
- https://getmaildoso.com
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Maildoso is a B2B cold email infrastructure provider, founded in 2023, that supplies outbound-focused SMTP and Google Workspace mailboxes, domain registration, and API tooling to sales teams, agencies, and developers running cold outreach at scale.
- Ownership category
- akta.pro rank
Maildoso industry classification
Industry- Product category
- Cold Email Infrastructure
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Email Authentication & Domain Protection (DMARC/SPF/DKIM) (HDADAKAC)
- akta.pro secondary industry
- Email Marketing Services (Campaigns, Deliverability, Lifecycle) (BPAFAKAB)
Keywords
Where Maildoso is headquartered
LocationHeadquarters
- HQ city
- Granite Bay
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Maildoso business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations
Revenue model
- SMTP Mailbox Subscriptions: Monthly or quarterly subscription for SMTP mailboxes with license-based pricing. Starting at $0.49/month per mailbox. Domains included with quarterly plans.
- Google Workspace Mailboxes: Monthly subscriptions for authentic Google Workspace mailboxes with higher deliverability to personal email providers. Includes business license.
- Domain Registration: Annual domain registration at $12/year per domain. Available TLDs include .com, .net, .org, .one, .co, .email, .ink, .digital, .company, .pro, .services, .space, .co.uk, .de.
- Custom Enterprise Plans: Custom plans for high-volume customers requiring more than 10,000 mailboxes with special pricing conditions negotiated directly with sales team.
- Affiliate Program: 20% recurring commission for referring new users to the platform.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | SMTP Mailboxes starting at $0.49/month |
| Subscription | Monthly | Google Workspace Mailboxes |
| Subscription | Annual | Domain Registration at $12/year |
| Unit Pricing | Multi-year contract | Custom Plans for Volume |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels10 records
Maildoso product offering
Product offeringCore offering
Maildoso is an email infrastructure provider for outbound cold email campaigns. The company sells proprietary SMTP mailboxes and authentic Google Workspace mailboxes, paired with domain registration and automated SPF/DKIM/DMARC configuration, designed to maximize inbox placement for B2B outreach. Customers manage domains, mailboxes, and integrations with major email sequencers (Instantly, Smartlead, Saleshandy, EmailBizon) through a self-serve dashboard and an API/MCP server.
Product overview
Maildoso is a B2B cold email infrastructure platform providing outbound mailboxes and domain management specifically designed for cold outreach and email deliverability. The platform offers two primary mailbox types: SMTP Mailboxes (proprietary lower-cost option starting at $0.49/month) and Google Workspace Mailboxes (official Google accounts with more stable deliverability). These mailboxes are supported by domain registration and management services, automated DNS configuration (SPF/DKIM/DMARC), and native integrations with major email sequencers including Instantly, Smartlead, Saleshandy, and EmailBizon. The platform also provides deliverability consulting, inbox placement testing, and automated mailbox health monitoring.
Differentiator
Problem solved
Functional benefit
Products and services
- SMTP Mailboxes Proprietary outbound-focused SMTP mailboxes built on Maildoso's owned servers and IPs. Includes automatic IP rotation, Global Customer Domain Tracking for safe link/image replacement, automated burned-out mailbox recovery, and inbox placement testing every 3 days with health scores. Designed for sales teams and agencies running cold outreach at scale.
- Google Workspace Mailboxes Authentic Google Workspace accounts with business licenses, offered monthly. Each domain is hosted on a fully isolated Google Workspace account to maximize deliverability to personal email providers (Gmail, Outlook, Hotmail). Includes profile picture capability and automatic sequencer connection.
- Domain Registration Domain registration service with fixed $12/year pricing. Supports multiple TLDs (.com, .net, .org, .one, .co, .email, .ink, .digital, .company, .pro, .services, .space, .co.uk, .de). Existing external domains can also be connected to the Maildoso dashboard.
Quantifiable outcome
- 95%+ email deliverability rate
- +4 more outcomes
Companies that use Maildoso
Customer profileNamed customers14 records
Segments3 records
Ideal customer profiles4 records
Maildoso technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
AI capability2 records
Feature8 records
Maildoso partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core.
- InstantlycoreNative integration partner. One-click mailbox sync without manual CSV import. Users can automatically export mailboxes to Instantly directly from Maildoso dashboard.
- SmartleadcoreNative integration partner. One-click mailbox sync capability. Direct export of mailboxes to Smartlead sequencer.
- SaleshandycoreNative integration partner. One-click mailbox sync. Co-founder Dhruv Patel publicly endorses Maildoso as 'game changer for deliverability.'
- EmailBizoncoreNative integration partner with one-click mailbox sync capability.
- Google WorkspacecoreProvides authentic Google Workspace accounts integrated into Maildoso platform. Each domain hosted on fully isolated Google Workspace account for enhanced deliverability.
Scale indicators7 records
Recent moves4 records
Expansion highlights6 records
Maildoso competitors and assessment
Company assessmentDirect peers
- Mailreach: Email warm-up and deliverability platform for cold outreach. Directly competes with Maildoso's deliverability-focused value proposition for SDRs and agencies.
- Warmbox: AI-driven email warm-up service that improves sender reputation. Operates in the same deliverability infrastructure category as Maildoso for outbound senders.
- Lemwarm: Email warm-up tool built specifically for cold outreach, offering similar mailbox reputation management to Maildoso's deliverability features.
- TrulyInbox: Email warm-up and deliverability platform targeting cold email senders, overlapping with Maildoso's sender-reputation and inbox placement value proposition.
- Folderly: Email deliverability monitoring and improvement platform with spam testing, DMARC/SPF/DKIM checks, and placement testing — directly competing with Maildoso's deliverability suite.
- InboxAlly: Deliverability platform that uses seed-list engagement to improve sender reputation, comparable to Maildoso's continuous inbox placement testing approach.
Emerging players
- Instantly: Leading cold email sequencer and a key Maildoso integration partner. Could emerge as a vertical competitor by building or acquiring proprietary mailbox infrastructure.
- Smartlead: Cold email automation platform that integrates natively with Maildoso. Competes for agency and SDR mindshare and represents both a distribution channel and a potential vertical-integration threat.
- Woodpecker: Cold email automation tool for B2B sales teams. A Maildoso customer and adjacent sales engagement player that could broaden into infrastructure.
Others
- ZeroBounce: Email validation and deliverability platform. Adjacent infrastructure provider commonly used alongside Maildoso by the same outbound customer base.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Maildoso social profiles
Digital presenceMaildoso financial estimates
Financial estimateRevenue estimate
Valuation estimate
Maildoso leadership team
Management profileNumber of profiles
Profiles1 record
Maildoso funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Maildoso 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 Maildoso
What does Maildoso do?
Maildoso is an email infrastructure provider for outbound cold email campaigns. The company sells proprietary SMTP mailboxes and authentic Google Workspace mailboxes, paired with domain registration and automated SPF/DKIM/DMARC configuration, designed to maximize inbox placement for B2B outreach. Customers manage domains, mailboxes, and integrations with major email sequencers (Instantly, Smartlead, Saleshandy, EmailBizon) through a self-serve dashboard and an API/MCP server.
Is Maildoso a public or private company?
Maildoso is a private company. It is classified as unknown and is currently operating.
When was Maildoso founded?
Maildoso was founded in 2023. It employs 11 to 50 people.
Where is Maildoso based?
Maildoso is headquartered in Granite Bay, United States, in the North America region.
How does Maildoso make money?
Five revenue lines are on record. SMTP Mailbox Subscriptions are the primary driver. The others are google Workspace Mailboxes, domain Registration, custom Enterprise Plans and affiliate Program.
Who are Maildoso's main competitors?
Direct peers on record are Mailreach, Warmbox, Lemwarm, TrulyInbox, Folderly and InboxAlly. Emerging players are Instantly, Smartlead and Woodpecker. ZeroBounce is listed as an others.
Does Maildoso have an API?
Yes. Maildoso API and MCP server allow developers to programmatically register domains, create mailboxes, and set up SPF, DKIM and DMARC authentication. Developers can export mailboxes straight to their sequencer, and can even run the entire setup from an AI assistant like Claude. The API supports connecting external domains, with documentation available for domain registration endpoints. Developer documentation is at developers.maildoso.com.
What industry is Maildoso in?
Maildoso's product category is Cold Email Infrastructure. Its primary akta.pro industry code is HDADAKAC, Email Authentication & Domain Protection (DMARC/SPF/DKIM), with a secondary code of BPAFAKAB, Email Marketing Services (Campaigns, Deliverability, Lifecycle). Its SIC code is 7372.