ZeroBounce vs Maildoso
 ZeroBounce |  Maildoso | |
|---|---|---|
| Sentiment | ||
| Score | 27/100 | 7/100 |
| Rank in category | #1 | #3 |
| Rated comments | 10 | 8 |
| Best for | Marketers who want an established verifier and can absorb a higher per-email price; Routine cleaning of opt-in or older marketing lists | Small setups that want an all-in-one mailbox purchase and will watch placement closely |
| Skip it if | Early-stage teams on a tight verification budget; B2B lists heavy in startup or catch-all domains | Agencies whose client results depend on inbox placement; Teams that expect the vendor to troubleshoot spam placement |
| Pricing (vendor-stated) | Free plan with 100 validation credits a month (business-domain signup). Pay-as-you-go from $39 for 2,000 credits. ZeroBounce ONE subscription from $99/mo for 10,000 credits, 20% off billed annually; over 1M credits is sales-led. | Monthly per-mailbox plans: 30 mailboxes for $75/mo ($2.50 each), 300 for $225/mo, 1,000 for $499/mo; domains extra at $15/year; quarterly plans with domains included are labelled legacy. 30-day money-back guarantee on monthly packages; no free plan or trial. |
Independent users who report on ZeroBounce mostly describe it as an accurate, established verifier for list cleaning, but price is the recurring complaint and its accuracy is disputed on B2B lists, where one user says conservative risk scoring bins valid addresses. About two-thirds of the 49 Reddit mentions are promotional, including a one-day burst of near-identical posts pitching FilterBounce, DoYouMail and Mystrika as ZeroBounce replacements, repeated plugs for one cheaper verifier, and seeded Prospeo switching stories, so this rests on about ten independent opinions, most of them brief.
Users like
Users complain about
- Expensive: users call it pricey, and an early-stage team says the API pricing became too heavy[1][2]
- Accuracy is contested on B2B data: one team left over low accuracy, and another says its conservative risk scoring pushes good startup addresses into the risky bucket[1][2]
- Cleaned lists still produced bounces for users verifying Apollo leads[1][2]
- A customer verifying a large HubSpot database says support treated them like a nuisance and is looking to replace it[1]
Independent users mostly report poor inbox placement: mail landing in spam after warmup, domains that stopped performing, and one agency that says it lost clients, with a former customer adding that support blames copy instead of the infrastructure. A couple of users found it a simple, workable all-in-one setup, but the positive side is brief. Nearly half of the 22 comments look promotional, including a reseller seeding cluster and a run of casual 2026 posts repeating the same cheap-SMTP-versus-Google-Workspace talking points, one thread of which another commenter called out as shilling.
Users like
Users complain about
- Mail lands in spam even after warmup: users report about half going to spam at 10 sends a day, domains that stopped firing, and lost clients; one deliverability-minded commenter blames the shared IPs[1][2][3][4]
- Support and its deliverability experts blame the email copy rather than investigating the infrastructure[1][2]
- Lacked built-in analytics, so monitoring deliverability needed third-party tools (2025 report)[1]