7 Best Alternatives to Warmy for Web in 2026
By Noahlast updated pricing verified
Of the 7 Warmy alternatives we track, 7 are available on Web: MailReach, Warmup Inbox, Folderly and 4 more. Each entry below keeps its full comparison from the main list.
Compared: Warmy alternatives that run on Web
| Alternative | Best for | Learning curve | Price |
|---|---|---|---|
| Warmyreference | Cold email and marketing teams that need to warm up a new sending domain or repair a damaged sender reputation before scaling outreach volume. | Low | Custom pricing |
| MailReach | Warming up and repairing the sender reputation of Google Workspace and Outlook mailboxes used for B2B cold outreach, before and between campaigns | Low | Free tier · paid from $15/mo |
| Warmup Inbox | Cold-email SDR teams and agencies warming up multiple client sending domains before launching outbound campaigns. | Low | From $15/mo |
| Folderly | B2B sales and RevOps teams sending high-volume cold outbound email who need to test and maintain inbox placement across many mailboxes | Moderate | Free tier · paid from $79/mo |
| Instantly | Agencies and SDR teams running high-volume cold email campaigns across many client mailboxes who need built-in warmup, lead sourcing, and reply handling in one tool | Moderate | From $94/mo |
| Smartlead | Lead-generation agencies running cold email for many clients across hundreds of mailboxes that need rotation, warmup and white-label client workspaces | Moderate | From $39/mo |
| lemlist | Sales teams and agencies running cold outbound campaigns that need a combined lead database, multichannel sequencer, and deliverability toolkit in one subscription. | Moderate | From $55/mo |
| Gaitle | Early-stage SaaS founders on a new sending domain whose welcome emails, password resets and billing alerts keep landing in spam or Promotions | Low | Free tier · paid from $19/mo |
Warmy
MailReach
Warmup Inbox
Folderly
Instantly
Smartlead
lemlist1MailReach — best Warmy alternative for warming up and repairing the sender reputation of Google Workspace and Outlook mailboxes used for B2B cold outreach, before and between campaigns
Pros
- Warmup network of 30,000+ inboxes, mostly Google Workspace and Office 365, the providers that matter for B2B deliverability.
- Works with any SMTP provider, including Gmail, Outlook, Zoho, SendGrid, Mailgun and Amazon SES.
- Spam tests report placement by provider across 30+ seed mailboxes, and the free checker allows 3 tests per 24 hours without an account.
- Volume discounts bring warmup from $25 down to $16 per mailbox per month, with 20% off on annual billing.
- Warms the address, its domain and the sending IP, and can help restore a damaged reputation.
Cons
- Billed per mailbox, so large inbox fleets cost far more than tools with unlimited built-in warmup.
- No campaign sending; it has to be paired with a separate outreach tool.
- No free trial of warmup; only the spam checker is free.
- MailReach's terms say a month that has started is not refunded after cancellation.
Pricing: Free tier · paid from $15/mo (verified )
2Warmup Inbox — best Warmy alternative for cold-email SDR teams and agencies warming up multiple client sending domains before launching outbound campaigns.
Pros
- Network of 30,000+ real inboxes across 25+ providers instead of shared fake mailbox pools
- Automatic blacklist monitoring and rescue across 100+ blacklists, checked hourly
- Connects to Gmail, Outlook/Microsoft 365, Yahoo, Zoho, custom SMTP, and Amazon SES
- 7-day free trial with no credit card required
- 4.6/5 average rating across G2, Trustpilot, and Capterra
Cons
- No permanent free plan, only a 7-day trial
- Per-inbox pricing scales linearly, making multi-inbox agency use expensive fast
- Custom template control, language warmup, and specific ESP warmup are locked behind the Pro and Max tiers
- Pricing above 50 inboxes is not published and requires a sales call
Pricing: From $15/mo (verified )
3Folderly — best Warmy alternative for B2B sales and RevOps teams sending high-volume cold outbound email who need to test and maintain inbox placement across many mailboxes
Pros
- Free tier available on both Inbox Insights (2 tests/month) and Pulse monitoring
- Covers the full deliverability workflow: pre-send testing, ongoing maintenance, and real-time monitoring in one ecosystem
- SOC 2 and ISO 27001 compliance claimed, relevant for teams handling sensitive outbound data
- Integrates via API and SMTP with major ESPs plus custom providers
- Independently rated 4.8/5 on G2 and 4.9/5 on Capterra
Cons
- Core Folderly product is per-mailbox priced ($96/mailbox/month annual), which gets expensive for teams with many sending mailboxes
- Core product requires a sales demo instead of self-serve signup
- Inbox Insights free tier is limited to only 2 tests per month
- No listed platforms beyond web; no native desktop or mobile app
Pricing: Free tier · paid from $79/mo (verified )
4Instantly — best Warmy alternative for agencies and SDR teams running high-volume cold email campaigns across many client mailboxes who need built-in warmup, lead sourcing, and reply handling in one tool
Pros
- Unlimited sending mailboxes and unlimited warmup even on the entry Starter bundle
- Built-in B2B lead database and enrichment removes the need for a separate prospecting tool like Apollo or RocketReach
- AI Sales Agent and AI Reply Agent automate campaign creation and inbox replies
- Volume-based plans scale cleanly from 5,000 to 500,000+ emails per month
Cons
- No free plan; every tier is a paid monthly subscription with no published free trial length
- Three overlapping pricing structures (Bundles, Outreach-only, Credits-only) make cost comparison confusing
- Advanced deliverability infrastructure (SISR dedicated IP system) is only available on the $555+/month Agency bundle
- Enterprise-level volume and account management require a custom sales call rather than self-serve checkout
Pricing: From $94/mo (verified )
5Smartlead — best Warmy alternative for lead-generation agencies running cold email for many clients across hundreds of mailboxes that need rotation, warmup and white-label client workspaces
Pros
- Unlimited mailboxes and unlimited warmup on all four plans, so adding inboxes does not raise the subscription.
- Automatic sender rotation spreads each campaign across connected mailboxes to protect individual sender reputation.
- Master inbox auto-categorizes replies from every mailbox and client and syncs them to HubSpot, Salesforce or Pipedrive.
- White-label client workspaces at $29/month each let agencies run Smartlead under their own brand.
- API, webhooks and an MCP server let teams drive campaigns from Clay, n8n, Make or Claude.
Cons
- The Base plan excludes the API, webhooks and CRM that agencies usually need.
- Add-ons stack up: SmartDelivery placement tests start at $49/month, dedicated SmartServers cost $39/server/month and verified leads cost $59/month on Base and Pro.
- Support is AI-first: ticketed human support was replaced by SmartAssistant, with staff stepping in by phone for unresolved issues.
- The iOS app rates 2.1/5 from 9 App Store ratings, so day-to-day work stays on the web app.
Pricing: From $39/mo (verified )
6lemlist — best Warmy alternative for sales teams and agencies running cold outbound campaigns that need a combined lead database, multichannel sequencer, and deliverability toolkit in one subscription.
Pros
- Combines lead database, enrichment, multichannel outreach, and deliverability warm-up in one subscription instead of three separate tools
- Unlimited users and senders on the Email plan at $55/user/mo (billed yearly)
- Native LinkedIn, SMS, WhatsApp, and call-dialer automation on the Multichannel plan, not just email
- 500+ integrations plus API, CLI, and MCP access on every plan, including the entry Email tier
Cons
- No permanent free tier, only a 14-day free trial with no credit card required
- Verified email/phone lookups and intent signals cost extra lemlist credits on top of the seat price
- Multichannel features (LinkedIn, SMS, calling, unified inbox) require the pricier per-user Multichannel plan, not the base Email plan
- Enterprise pricing is custom and requires a sales call, no self-serve number published
Pricing: From $55/mo (verified )
7Gaitle — best Warmy alternative for early-stage SaaS founders on a new sending domain whose welcome emails, password resets and billing alerts keep landing in spam or Promotions
Pros
- Sends from your own domain and provider (Resend, Postmark or Mailgun) with no shared IPs, and provider API keys are stored encrypted.
- Exactly one email per signup, never a drip sequence, which keeps complaint risk low.
- Setup is one webhook call from Stripe, Clerk, Supabase or your own backend, live in about five minutes.
- Free for up to 100 users a month with no card; paid plans start with a 14-day trial and cancel in one click.
- Every reply is forwarded to your inbox, so the nudge doubles as a direct line to new users.
Cons
- Narrow scope: it improves reputation only through new-signup replies, not for existing lists, cold outreach or non-repliers.
- Not standalone; it requires your own Resend, Postmark or Mailgun account and a verified domain.
- The free tier caps at 100 users a month and the next step is Starter at $19/month for up to 2,000, with nothing in between.
- Any deliverability gain is indirect and depends on recipients choosing to reply, so results vary and are hard to attribute.
Pricing: Free tier · paid from $19/mo (verified )