Most cold email doesn't fail because the message was bad ā it fails because the message never reached the inbox. Gmail and Outlook flag brand-new domains and cold-sounding patterns as spam by default, so before you can even test your copy, you need domains that are properly configured (SPF, DKIM, DMARC) and "warmed up" by sending and receiving real-looking traffic for a few weeks. A specific category of tools now exists just to handle that plumbing. Here are 7 of them, all real products, covering everything from pure warmup services to full outreach platforms with warmup built in.
The short version
If you just need warmup for domains you already own, Mailwarm is the dedicated specialist. If you're setting up sending infrastructure from scratch and want the lowest cost with no minimums, Mailpool wins on price. If you're sending at real volume and want SOC2 compliance and API access, Mailforge is built for that. And if you'd rather have one subscription that also finds leads and verifies emails instead of stitching tools together, look at Sparkle, DeliverymanAI, Emelia or Sendr.ai.
1. Mailpool ā cheapest way to get started
Mailpool automatically buys domains, sets up inboxes, and configures the DNS records cold email needs ā all in about 5 minutes, with no minimum number of mailboxes required. It's already running 35,000+ domains and 250,000+ mailboxes for customers.
Price: $3/mailbox/month ($2.60 billed annually), no minimum.
Good for: anyone testing cold email who doesn't want to commit to a big minimum spend.
Watch out for: no free trial, and deliverability reputation is partly tied to Mailpool's shared infrastructure rather than fully isolated per customer.
2. Mailforge ā best for volume and compliance
Mailforge does the same automated domain/inbox setup as Mailpool but is built for bulk from the start ā SOC2 compliant, with API/MCP/CLI access, and already used by 10,000+ companies. It undercuts Google Workspace or Microsoft 365 pricing at volume.
Price: $75/month for a 10-mailbox minimum ($60/month billed annually), plus ~$14/year per .com domain.
Good for: teams sending at real scale who need audit-ready compliance (SOC2) and programmatic control.
Watch out for: the 10-mailbox minimum makes it a heavier commitment than Mailpool if you're just starting out, and there's no free trial.
3. Mailwarm ā best dedicated warmup specialist
Mailwarm doesn't set up domains ā it just warms up inboxes you already have, using a network of 50,000+ real, aged mailboxes to build sending trust with Gmail, Outlook, Yahoo and Zoho. It shows a live inbox-vs-spam placement dashboard and is backed by Y Combinator, with Michelin, Microsoft and Deel listed as customers.
Price: base subscription + $0.02 per interaction beyond the included volume; warmup starts as soon as you connect an account, no classic free trial.
Good for: anyone who already has domains and mailboxes and just needs the trust-building step.
Watch out for: its 98%/59% stats measure warmup performance, not how your actual campaigns will perform, and the cost-per-interaction model needs watching at scale.
4. DeliverymanAI ā best hands-off full setup
DeliverymanAI configures SPF/DKIM/DMARC/MX automatically, sets up mailboxes without needing a Google Workspace account, and includes automated warmup and blacklist monitoring ā a fully hands-off version of the Mailpool/Mailwarm combination.
Price: Starter $49/month (6,000 emails/month, 2 domains) up to Max $599/month (300,000 emails/month, 100 domains); 70% off the first month on every tier.
Good for: teams that don't want to manage DNS manually at all and prefer one tool for the whole setup.
Watch out for: it requires transferring your domain's nameservers to DeliverymanAI, and the Max tier gets expensive fast if you're scaling to many domains.
5. Sparkle ā best all-in-one for solo founders
Sparkle bundles cold-email sending, a lightweight CRM, and email verification into one subscription with unlimited users and workspaces on every plan, including a free tier for testing verification before you pay.
Price: free plan (200 daily verifications); paid Monthly and Pay-As-You-Go plans on top.
Good for: a solo founder or small team that wants outreach, CRM and verification without three separate subscriptions.
Watch out for: bundling means each piece (CRM, verification, warmup) is less specialized than a dedicated point solution, and its delivery/reply-rate stats are self-reported, not independently audited.
6. Emelia ā best for combined email + LinkedIn outreach
Emelia automates both email and LinkedIn outreach in one tool, finds prospect contact details (around an 80% success rate), and includes built-in warmup ā plus it scrapes Sales Navigator without the usual 2,500-result cap.
Price: Start ā¬37/month (3 mailboxes, 1 LinkedIn account), Grow ā¬97/month, Scale ā¬297/month (unlimited mailboxes); pay-as-you-go credits from ā¬19/month.
Good for: teams running email and LinkedIn outreach together rather than as separate motions.
Watch out for: the entry tier costs more than a mono-channel tool like Mailpool, and pay-as-you-go credits stack on top of the subscription price.
7. Sendr.ai ā best for personalized video outreach
Sendr.ai takes a different angle: it finds prospects from a 500M+ B2B profile database, then auto-generates a personalized-looking video for each one (name and company mentioned) across email, LinkedIn and WhatsApp, instead of sending the same static email to everyone.
Price: free trial (300 credits); $119/month (2,500 credits, 250 videos), $1,499/year (30,000 credits, 3,000 videos), Concierge $300/month.
Good for: teams that want to stand out with personalized video rather than compete purely on deliverability infrastructure.
Watch out for: it only launched in July 2026, so its 3.1x reply-rate claim isn't independently verified yet, and pricing is fragmented across separate add-ons.
| Tool | Best for | Starting price | Free trial |
|---|---|---|---|
| Mailpool | Cheapest setup, no minimum | $3/mailbox/mo | No |
| Mailforge | Volume + SOC2 compliance | $75/mo (10 mailboxes) | No |
| Mailwarm | Dedicated warmup only | Base + $0.02/interaction | No |
| DeliverymanAI | Hands-off full setup | $49/mo | 70% off month 1 |
| Sparkle | Solo founder all-in-one | Free tier | Yes |
| Emelia | Email + LinkedIn combined | ā¬37/mo | No |
| Sendr.ai | Personalized video outreach | $119/mo | Yes, 300 credits |
None of these tools can fix bad copy or a bad offer ā they only remove the technical reason your good copy never gets read. Most people are best served by picking one setup tool (Mailpool or Mailforge depending on scale) plus warmup if it's not already included, rather than layering every product on this list. And treat every vendor's self-reported delivery and reply-rate numbers with a healthy dose of skepticism ā none of them are independently audited, including the ones on this list.