Sending.ac Alternative & Review
Looking for a Sending.ac alternative? Compare pricing, ratings, features, pros, cons, drawbacks, and better options for cold email infrastructure.
Key Takeaways
- Sending.ac focuses on Azure-based infrastructure.
- Maildoso.ai offers SMTP/GW mailboxes, full API access, self-healing and IP rotation.
- Sending.ac has a higher minimum order requirement. Its pricing starts at $0.44/month per mailbox with a minimum order of 450 mailboxes ($199). Maildoso has a minimum limit of 10 mailboxes, which costs $28.
Sending.ac Review
Looking for a Sending.ac alternative? Compare pricing, ratings, features, pros, cons, drawbacks, and better options for cold email infrastructure.
Pros
- 🟢 Dedicated Azure outbound tenants.Sending.ac offers 100% isolation with a dedicated Azure outbound tenant per domain, enhancing deliverability and security.
- 🟢 No shared IPs with automatic rotation. The service ensures no shared IPs, with automatic replacement every 14 days, which helps maintain sender reputation.
- 🟢 Automated and fast mailbox setup. Mailbox setup is fully automated and quick, taking approximately 34 seconds per mailbox.
Cons
- 🔴 High minimum order.A minimum order of 450 mailboxes might be restrictive for smaller users or those just starting.
- 🔴 API access not publicly found. Information regarding API access for programmatic control is not readily available on their public res.
- 🔴 Self-healing features not explicitly mentioned. Beyond general isolation claims, specific self-healing or recovery features are not explicitly detailed.
Maildoso Review
Maildoso is an outbound infrastructure provider built around dedicated IPs, white-glove deliverability onboarding, and a flat per-mailbox model with no per-account cap. It is designed for sales and demand-gen teams that need predictable inbox placement at scale without operating their own mail servers.
Maildoso Pros
- Dedicated IPs from day one — no shared-pool contamination from neighbouring senders.
- White-glove onboarding with deliverability engineers; SPF, DKIM, and DMARC configured for you.
- Flat per-mailbox pricing with no monthly send cap and no per-account markup.
- Direct support from a team that operates mail infrastructure, not generic ticket triage.
Maildoso Cons
- Higher entry price than shared-IP services aimed at single-mailbox use.
- Designed for teams sending at scale; overkill for one or two mailboxes.
Detailed Pricing Comparison
| Mailbox type | Price per mailbox | Minimum package |
|---|---|---|
| Maildoso SMTP | $0.49-2.5 | $25 |
| Maildoso GW | $2.7-4 | $40 |
| Sending.ac | $0.44 | $199 |
Feature Comparison Table
| Feature | Maildoso | Sending.ac |
|---|---|---|
| Mailbox types | SMTP, GW | Azure |
| API Availability | Full access (on all plans) | IP type |
| IP rotation (best for deliverability) | Azure IPs | Self-healing mailboxes |
| Support | Email, Chat, Slack, Tech Audits | Not specified |
| Refund policy | 30-day guarantee | No refunds |
| Trials | 300 mailboxes for 30 days | Final rating |
Cold outreach breaks when infrastructure breaks. A campaign can have strong targeting, clean copy, and good sequencing, but if the mailboxes are weak, the result is still spam placement, account churn, and stalled pipeline. The problem becomes more expensive at scale because every burned mailbox can mean lost warmup time, new DNS work, reconnecting sequencers, and replacing domains.
This comparison looks at Sending.ac and Maildoso as infrastructure providers for teams that need outbound-ready mailboxes. The focus is practical: pricing, mailbox types, IP approach, recovery options, support, refund visibility, public reviews, and what each provider is best suited for.
Key Takeaways
Sending.ac Review
The company was founded in 2024 by Yannic Schwock, Felix Seidel, Dharmendra Soni, and Thierry Maftoum.
Sending.ac positions itself as a provider of Azure-based cold email infrastructure; the platform highlights automated DNS setup and a focus on keeping emails out of spam folders. They also emphasize 100% isolation with a dedicated Azure outbound tenant per domain and avoid shared IPs, with automatic replacement every 14 days.
The True Cost of Bad Deliverability
Do not choose a provider just because they offer the cheapest inboxes. Cheap infrastructure always costs more in the long run. When your deliverability drops, you pay for it in three ways:
- You burn expensive leads. Good B2B data costs money. If your emails land in the spam folder, you waste those leads. You pay for contacts who never even see your pitch.
- You destroy your domains. Once spam filters flag a domain, it is incredibly hard to fix. You usually have to throw the domain away, buy a new one, and start the warm-up process all over again.
- You lose revenue. Every email that goes to spam is a missed meeting. In B2B sales, missing one connection can cost you thousands of dollars in closed revenue.
You have to treat cold email infrastructure as an investment. Maildoso.ai gives you the technical tools to protect your domains and keep your emails in the primary inbox. It is the only way to scale outbound sales profitably.
Final Thoughts
We generally advise against using Sending.ac.
The issue isn’t necessarily with this specific product, but rather with Azure tenants as a whole. Despite their low cost, these accounts simply cannot send a sufficient volume of emails (only 2–4 per day). Furthermore, we frequently hear reports of Azure tenants being blacklisted by email service providers, often leading to a total infrastructure ban that forces the provider to shut down entirely.
If you don’t currently have any mailboxes, it’s better to start with more reliable providers like Maildoso, Zapmail, or Scaledmail. On the other hand, if you already have an established setup and are simply looking to experiment, there are other Azure tenant providers on the market offering much more flexible and affordable entry-level plans.
FAQ
Is Sending.ac cheaper than Maildoso?
Sending.ac might seem cheaper since you only pay $0.44 per mailbox, but Azure limits you to just 2-4 emails per day. With Maildoso, you can confidently send up to 20 emails per day from a single mailbox starting at just $0.49. While our price is quite similar, you can send 10 times more volume per mailbox. Also, you can buy just 10 mailboxes for $28 – no need to buy 450 of them.
Does Sending.ac offer API access?
No, they don’t have API. We do.
Which is better for high-volume outbound?
Ultimately, Maildoso is the superior choice. Our mailboxes are more reliable thanks to our unique IP Rotation and Self-healing technology, our pricing is more competitive, and our support is easily accessible via live chat on our website, Reddit, email, and Slack.
