How this page was made. Every price and claim below was read from each vendor's own pages on 19 September 2026 and is linked to its source; where a vendor does not publish a figure we say so. emailcampaign.ai is one of the alternatives listed and we say where it fits and where it does not. Prices change; check the linked pages before buying.
Superwave sold Google Workspace cold email infrastructure on application, with a placement guarantee and, according to third-party reviews, an entry price around $5,000 a year. When we checked on 19 September 2026, neither superwave.ai nor superwave.io loaded, the domains' registration records had changed in August, and the most recent reviews described unanswered support and customers unable to send weeks after paying. If you hold mailboxes there, the practical question is where to move them and how to keep sending while you do.
Why people look for a Superwave alternative
- The websites were unreachable on our read date and the domain records changed on 12 August 2026 (source)
- Reviews describe a promised 24-hour setup stretching past five days and support that stopped answering (source)
- Pricing was never published; third parties report quote-only terms and a large minimum (source)
- Microsoft 365 was reported as unsupported, so a mixed fleet was not possible (source)
The alternatives at a glance
| Tool | Starting price | Provisions mailboxes and domains | Warm-up | White-label |
|---|---|---|---|---|
| Superwave | Not published; third-party reviews report quote-only pricing from about $4 to $7 a mailbox or roughly $5,000 a year minimum | Reported: Google Workspace accounts and domains; Microsoft 365 reported as unsupported | Reported as bundled | Not mentioned anywhere we found |
| Premium Inboxes | $3.50 an inbox a month up to 249 inboxes; $3.00 from 250; $2.80 from 1,250 | Yes: Google Workspace and Microsoft 365 inboxes, uploaded into Smartlead or Instantly for you; no domains sold | They start the warm-up for you; no detail published | None |
| Primeforge | $4.50 per mailbox slot a month billed yearly, minimum 10 slots | Yes: Google Workspace and Microsoft 365 mailboxes and domains | Not included; Warmforge separate | Via the Salesforge reseller programme |
| Zapmail | $39 a month for 10 mailboxes, then $3.50 each; hero price 'from $2.50 a mailbox' on annual | Yes: Google Workspace and Microsoft 365 mailboxes; domains $13 to $14 a year | No ongoing warm-up; pre-warmed mailboxes sold separately, maintained for twelve months, not renewable | None; affiliate programme at 10 percent |
| Saleshandy | $34 a month annual ($41 monthly) for 2,000 prospects and 6,000 emails | Yes: Google Workspace, Microsoft 365 and Azure mailboxes, pre-set with SPF, DKIM, DMARC and a tracking domain | Included through its partner TrulyInbox | Scale plan and above ($149 a month annual): custom domain and logos |
| Instantly | $37.60 a month annual ($47 monthly) for 5,000 emails and 1,000 contacts | Yes, Google only: pre-warmed accounts with DNS pre-configured; Instantly retains domain ownership and administrator access | Included, unlimited | Hypergrowth ($77.60) and Light Speed plans: custom domain and logo for a client portal; clients with campaign access see every campaign in the workspace |
| emailcampaign.ai | Free 14-day trial; Basic $39 a month; Pro $94 a month | Yes: domains (about $12 a year), Google Workspace seats ($8.40 a month), Microsoft 365 seats at Microsoft's rate, or self-hosted servers from $39 a month; you own the domains and accounts | Included, unlimited, with a maintenance level after the ramp; never reaches your inbox | Yes: a complete webmail and admin console on the client's own domain, plus dashboard branding |
1. Premium Inboxes · A reseller that hand-configures Google Workspace and Microsoft 365 inboxes on domains you bring.
| Price | $3.50 an inbox a month up to 249 inboxes; $3.00 from 250; $2.80 from 1,250 |
| Model | Per inbox, no monthly commitment, unlimited replacement inboxes; you bring the domains |
| Provisioning | Yes: Google Workspace and Microsoft 365 inboxes, uploaded into Smartlead or Instantly for you; no domains sold |
| DNS | Engineers configure and verify SPF, DKIM and DMARC by hand |
| Warm-up | They start the warm-up for you; no detail published |
| White-label | None |
| Placement test | None |
| Reviews | Trustpilot 5.0 from 494 reviews; G2 count from third parties only |
Best for: Agencies that want a human to set up hundreds of inboxes and are happy to bring their own domains
Watch out for: Reviews report Microsoft 365 stability past about 100 inboxes and a strict no-refund policy; per-inbox price is above the cheapest Google resellers
Sources: Pricing · Trustpilot
2. Primeforge · The Salesforge group's Google Workspace and Microsoft 365 provisioning.
| Price | $4.50 per mailbox slot a month billed yearly, minimum 10 slots |
| Model | Per slot; .com domains $14 a year; API; no free trial |
| Provisioning | Yes: Google Workspace and Microsoft 365 mailboxes and domains |
| DNS | Automatic DKIM, DMARC and SPF |
| Warm-up | Not included; Warmforge separate |
| White-label | Via the Salesforge reseller programme |
| Placement test | Via Warmforge, from $39 a month |
| Reviews | Reviewed under the Salesforge seller aggregate on G2 (4.6 from 255 across products) |
Best for: Salesforge users who want provider mailboxes inside the same group
Watch out for: Three sibling brands (Salesforge, Mailforge, Infraforge, Primeforge) confuse buyers, as G2 reviewers note
Sources: Primeforge pricing
3. Zapmail · Google Workspace and Microsoft 365 mailboxes sold in bundles, with a second-year price rise.
| Price | $39 a month for 10 mailboxes, then $3.50 each; hero price 'from $2.50 a mailbox' on annual |
| Model | Bundles of 10, 30 or 100; after the first year mailboxes rise to $6, $5.50 or $5 each plus base fees of $59, $169 or $499; payments are not refundable |
| Provisioning | Yes: Google Workspace and Microsoft 365 mailboxes; domains $13 to $14 a year |
| DNS | SPF, DKIM, DMARC and tracking domains set up automatically |
| Warm-up | No ongoing warm-up; pre-warmed mailboxes sold separately, maintained for twelve months, not renewable |
| White-label | None; affiliate programme at 10 percent |
| Placement test | None |
| Reviews | G2 4.3 from 6 reviews (third-party count); Trustpilot 4.5 from 87 |
Best for: Buying provider mailboxes quickly in bulk for a sequencer you already run
Watch out for: The year-two price step is easy to miss; reviews report India-based IPs despite US and EU marketing, and mailboxes burning out within one to two weeks
Sources: Zapmail · Year-two pricing · Review via Infraforge
4. Saleshandy · Outreach software with unusually cheap provider mailboxes attached.
| Price | $34 a month annual ($41 monthly) for 2,000 prospects and 6,000 emails |
| Model | Plan by prospects and emails; unlimited email accounts and warm-up mailboxes; infrastructure add-on at $2.99 to $3.99 a mailbox a month plus $14 a year per domain |
| Provisioning | Yes: Google Workspace, Microsoft 365 and Azure mailboxes, pre-set with SPF, DKIM, DMARC and a tracking domain |
| DNS | Included with provisioned mailboxes |
| Warm-up | Included through its partner TrulyInbox |
| White-label | Scale plan and above ($149 a month annual): custom domain and logos |
| Placement test | None found |
| Reviews | G2 4.6 from 773; Capterra 4.5 from 126 |
Best for: Price-sensitive teams that want sequencing and mailboxes from one vendor
Watch out for: Reviews mention charges after cancellation, marketing about daily caps, and bugs after releases
Sources: Pricing · Infrastructure
5. Instantly · The most-reviewed cold email tool, with pre-warmed Google accounts as an add-on.
| Price | $37.60 a month annual ($47 monthly) for 5,000 emails and 1,000 contacts |
| Model | Plan by emails and contacts; unlimited email accounts and warm-up; pre-warmed Google accounts $10 each a month in batches of five, domains $15 a year |
| Provisioning | Yes, Google only: pre-warmed accounts with DNS pre-configured; Instantly retains domain ownership and administrator access |
| DNS | Pre-configured on provisioned accounts |
| Warm-up | Included, unlimited |
| White-label | Hypergrowth ($77.60) and Light Speed plans: custom domain and logo for a client portal; clients with campaign access see every campaign in the workspace |
| Placement test | Yes, a separate Inbox Placement product with 25 free credits |
| Reviews | G2 4.8 from 4,134; Trustpilot score withheld, 1,165 reviews with 25 percent one-star |
Best for: Teams that already own their mailboxes and want the largest community and template library
Watch out for: Provisioned domains stay owned by Instantly; reviews report features behind paywalls that only appear after purchase and pre-warmed domains arriving with poor reputation
Sources: Pricing · Pre-warmed accounts · White-label
6. emailcampaign.ai · Cold email software that provisions and warms its own infrastructure, with a white-label door for agencies.
| Price | Free 14-day trial; Basic $39 a month; Pro $94 a month |
| Model | Plan by emails per month; unlimited mailboxes and warm-up on every plan; infrastructure at cost plus $5 setup per mailbox |
| Provisioning | Yes: domains (about $12 a year), Google Workspace seats ($8.40 a month), Microsoft 365 seats at Microsoft's rate, or self-hosted servers from $39 a month; you own the domains and accounts |
| DNS | SPF, DKIM (selectors read from the provider), DMARC and postmaster records written through the registrar and shown before they go live |
| Warm-up | Included, unlimited, with a maintenance level after the ramp; never reaches your inbox |
| White-label | Yes: a complete webmail and admin console on the client's own domain, plus dashboard branding |
| Placement test | Yes, per mailbox at Gmail and Outlook |
| Reviews | New listing; reviews being gathered |
Best for: Teams that want the mailboxes, domains, DNS and warm-up done for them behind one approval, and agencies that need a client-branded door
Watch out for: The recommended 8 to 10 sends a day per mailbox means volume comes from fleet size; if you want 100 a day from one mailbox, nothing here will let you
Sources: Pricing · Infrastructure
How to choose
- Decide who owns the domains and accounts. Some vendors keep ownership or administrator access; if you may leave, you want yours in your own name.
- Count the year-two price, not the launch price. Several infrastructure vendors step prices up after twelve months or sell pre-warmed mailboxes that expire.
- Ask what happens when a domain burns. Replacement policy, and whether the vendor pauses the sender or quietly suppresses your recipients.
- Check the review sites for cancellation stories. They are the most consistent complaint in this category across vendors.
- Send at 8 to 10 a day per mailbox whatever you buy. No vendor's mailbox survives 100 a day to strangers.
Questions, answered straight
- How do I move without losing the reputation I built?
- Reputation belongs to the domains, not to the vendor. If the domains are registered in your name, transfer the DNS and create new mailboxes on them at the new vendor; keep the same mailbox names, warm for two weeks at a low ramp, and resume. If the vendor owns the domains you cannot take them; register lookalikes and start the ramp from zero.
- Which alternatives let me own the domains and accounts?
- emailcampaign.ai registers domains in your name and creates the accounts under your ownership; Premium Inboxes has you bring your own domains. Read the ownership terms of any reseller quoting well under Google's $8.40 seat price.
- Can I keep sending during a migration?
- Yes, if you overlap: bring the new fleet up and through warm-up while the old one still sends, then shift volume over two weeks. A hard cutover on a single day is what produces the spam-folder week.
Published 19 September 2026. Updated 19 September 2026. Written by the team that runs the infrastructure; numbers come from the platform's own provisioning and sending, and from the providers' published documentation at the time of writing.