Superwave
Alternative & Review

Superwave describes itself as a managed outbound infrastructure platform designed specifically for B2B sales teams. Its homepage promotes guaranteed email deliverability, an AI-powered campaign engine, and custom-researched leads, aiming to replace a stack of multiple tools that sales teams typically use.

The product appears built for teams that want a provider to handle the entire outbound process, including infrastructure setup, data sourcing, and campaign execution. The service includes a dedicated deliverability specialist and actively manages bounce rates to ensure high inbox placement.

By the way, we haven't found any information about the foundation date or the founders.

Trustpilot: no reviews found.
G2: no reviews found.

• "We paid the company the $5k deposit for the year over a month ago and still have not been able to send out one email. Immediately after paying them, we heard nothing from the team for over a week. After scheduling meetings on their calendar that they never showed up to and sending out 30+ emails/slack messages, they finally onboarded us 2 weeks after we paid...I would not recommend them based on their lack of customer support."
• "I've had the same experience. Their software is unusable and their support is nonexistent."

Superwave Review/Good alternatives to Superwave?

🟢 Guaranteed 95%+ inbox placement backed by a financial SLA — they own and operate their own infrastructure and pay a penalty if the target isn't met.
🟢 Fully managed, done-for-you service that replaces a 5-7 tool outbound stack (infrastructure, data, AI campaigns, and a dedicated deliverability specialist in one).
🟢 Bespoke, human-verified lead lists researched for your exact ICP — not the recycled databases everyone else is sending to.

🔴 High upfront cost. Pricing is not published on the official site, but third-party sources indicate it starts at around $5,000 per year upfront, which is a significant barrier to entry for smaller teams or agencies.
🔴 Negative user feedback. Reddit users have reported significant issues with customer support and declining deliverability over time, suggesting a potential disconnect between the marketed white-glove service and the actual user experience.
🔴 Lack of transparency. Pricing, API access, and specific infrastructure details, such as the exact types of IPs used, are not clearly documented on the public website, requiring prospects to engage in a sales process to get basic information.

Maildoso is a cold outreach infrastructure provider – we offer domains, SMTP mailboxes, and Google Workspace accounts. The company was founded in August 2023 in Granite Bay, California, by Nikita Bykadarov (Nikita Maildoso).

While other providers offer shared or dedicated IPs, we have developed IP rotation. This means your emails are sent from hundreds of different IPs (making it harder for spam filters to detect a sending pattern), and whenever any IP gets blacklisted, we automatically swap it out for a clean one.

We have also implemented self-healing mailbox technology, which both restores burned-out mailboxes and protects your active email accounts.

The result?
As of May 2026, the spam rate across our entire network of mailboxes is around 5%.

G2: 4.7/5 (181 reviews)

"Tried it mainly because of the good price, but ended up sticking with it since deliverability’s been pretty stable so far" – Thinking about trying "Maildoso". Has anyone here used it? Is it actually better than other tools?

"I tested a small batch first and results were comparable to our Google setup. Ended up moving more campaigns there because of the lower cost. That's a good strategy, buy small package and compare with your current setup" – I want to try Maildoso. What do you guys think about it?

🟢 Dynamic IP Rotation: We rotate your IP addresses in real-time – if an IP gets flagged or blacklisted, we instantly swap it for a clean one before your campaign takes a hit, ensuring your emails consistently land in the primary inbox rather than getting stuck in spam.
🟢 Self-Healing Rotation: An automated resting period for mailboxes every two weeks that clears provider flags and recovers reputation on autopilot.
🟢 Global Customer Domain Tracking: Proprietary technology that allows you to safely include links without compromising your sender reputation.
🟢 Automated Inbox Placement Tests: Free email deliverability infrastructure testing every three days for all mailboxes, giving you real-time visibility into your health.

🔴 Conservative Limits: We suggest sticking to 15 emails a day per box to keep your domains healthy for the long run.
🔴 Google/SMTP Focus: We do not support Microsoft 365/Outlook/Azure environments at this time.
🔴 Lack of built-in warmup. We do not have an integrated warm-up yet, but we are currently working on it.

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:

1. 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.
2. 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.
3. 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.

Oh boy – out of all the infrastructure providers, this one raised the most red flags.

Is it an agency? Is it a 'Done-for-you' service? What kind of mailboxes are they using, and how much do they actually cost?

We couldn't find answers to any of these questions. However, we did find a Reddit thread where users shared negative experiences, noting that the service costs a staggering $5,000.

Ultimately, we don't have enough information to form a solid conclusion. We tried to reach out to the founder for clarity, but the company has no LinkedIn page, and there isn't a single profile on the platform identified as the founder