# Maildoso

**Source:** https://www.startuphub.ai/startups/maildoso
**Profile type:** Startup

> Maildoso provides cold email infrastructure, offering domain registration, mailbox creation, and deliverability optimization for B2B sales and marketing teams.

## About

Maildoso is a platform that provides comprehensive cold email infrastructure, enabling users to register domains, create mailboxes, and manage email deliverability for large-scale outbound campaigns. It automates technical configurations like SPF, DKIM, and DMARC, offers IP rotation and self-healing mailboxes, and integrates with popular cold email outreach tools. The platform aims to help B2B companies and lead generation agencies achieve high deliverability and streamline their cold email operations.

## Key facts

- **Slug:** maildoso
- **Website:** https://maildoso.ai
- **Location:** Granite Bay, United States
- **Founded:** 2023-01-01
- **Employees:** 26
- **Operating status:** Active
- **Sectors / tags:** Email Infrastructure, Cold Email, Email Deliverability, Sales Automation, Marketing Automation
- **Social:**
  - LinkedIn: https://www.linkedin.com/company/maildoso

## Pricing

| Plan | Price | Includes |
| --- | --- | --- |
| 30 Mailboxes | $75 / month | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |
| 300 Mailboxes | $225 / month | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |
| 1,000 Mailboxes | $499 / month | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |
| 32 Mailboxes + 8 Domains - Quarterly (legacy) | $299 / quarter | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |
| 68 Mailboxes + 17 Domains - Quarterly (legacy) | $499 / quarter | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |
| 400 Mailboxes + 100 Domains - Quarterly (legacy) | $2,199 / quarter | Self-healing mailboxes, IP rotation, CAPTCHA domain protection |

Monthly pay-per-mailbox pricing as of June 2026. Monthly plans do not include domains, domains cost $15 per year and can be purchased separately or connected externally. Quarterly plans are legacy and include domains.

Plans as published by Maildoso, checked November 2026.

## StartupHub.ai scores

- **Ahrefs DR:** 41/100
- **Agent Readiness:** D (58/100)
- **Site Speed:** 60/100
- **Data Trust:** 77/100

## Tech stack

Detected on maildoso.ai, last scanned 2026-11-03.

- **Analytics:** Google Tag Manager
- **CDN:** Cloudflare
- **Email provider:** Google Workspace
- **Booking / scheduling:** Calendly

## JSON-LD

Structured data aligned with this page's `<script type="application/ld+json">` (included when the profile is server-rendered).

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## Community reviews

Community reviews below were gathered from public sources into one place. Each quote is copied word for word and links to where it was posted.

- **Reddit r/SaaS** | Claudio_7890 | 2026-03-10 | positive | highlighted endorsement
  > "The truth about SMTP in 2026: A very deep Maildoso review (300k emails sent). When my agency hit over 1m emails every month, our Google Workspace infrastructure began to collapse under pressure. Although purchasing these accounts via resellers for $3-$3.50 made them less expensive than buying them directly from Google, I was constantly worried about being banned by Google due to “clustering”, essentially Google would wipe out all of your domain sets instantly (and yes, that happened to us twice)."
  > Source: https://www.reddit.com/r/SaaS/comments/1rphug0/the_truth_about_smtp_in_2026_a_very_deep_maildoso/
- **Reddit r/LeadGeneration** | shahzam_23 | 2025-01-09 | negative | highlighted criticism
  > "Maildoso (cold email infra) is crap - does anyone know a better alternative?. Guys / Maildoso hasn’t been upto the mark! It’s absolutely crap - emails get burnt out in a week and the rep there says “it will be alright” Something is fishy with this company!"
  > Source: https://www.reddit.com/r/LeadGeneration/comments/1hxezfu/maildoso_cold_email_infra_is_crap_does_anyone/
- **Reddit r/Coldemailing** | JoshTw0520 | 2025-11-13 | mixed
  > "Which should I trust for my email account health score? Maildoso or Smartlead?"
  > Source: https://www.reddit.com/r/Coldemailing/comments/1ow389y/which_should_i_trust_for_my_email_account_health/
- **Reddit r/AskMarketing** | starshine787 | 2025-06-17 | negative
  > "We've been using Maildoso for our cold email campaigns over the past year. While the service initially met our expectations, we've recently run into some serious issues. Without warning, the domains provided by Maildoso were blacklisted, which has drastically affected our email deliverability."
  > Source: https://www.reddit.com/r/AskMarketing/comments/1ldmut0/maildoso/
- **Reddit r/AskMarketing** | starshine787 | 2025-06-17 | negative
  > "We've been using Maildoso for our cold email campaigns over the past year. While the service initially met our expectations, we've recently run into some serious issues. Without warning, the domains provided by Maildoso were blacklisted, which has drastically affected our email deliverability."
  > Source: https://www.reddit.com/r/AskMarketing/comments/1ldmomh/maildoso/
- **Reddit r/SaaS_Email_Marketing** | shahzam_23 | 2025-01-09 | negative
  > "Maildoso is crap (cold email infra) - does anyone have a better alternative?. Guys / Maildoso hasn’t been upto the mark! It’s absolutely crap - emails get burnt out in a week and the rep there says “it will be alright” Something is fishy with this company!"
  > Source: https://www.reddit.com/r/SaaS_Email_Marketing/comments/1hxf05n/maildoso_is_crap_cold_email_infra_does_anyone/