Warmup Inbox vs Folderly 2026: $15 vs $96/Mailbox Pricing Compared

Warmup Inbox starts at $15/inbox per month with a 7-day free trial, per Warmup Inbox's pricing page. Folderly starts at $96/mailbox per month, billed annually only, per Folderly's pricing page. For a 10-inbox cold email operation, that gap is roughly $9,720/year. If you're running lean outbound, Warmup Inbox wins on price and transparency. Folderly's bundled monitoring suite fits bigger teams.

Warmup Inbox vs Folderly: Pricing and Features at a Glance

Warmup Inbox publishes three tiers starting at $15/inbox/month. Folderly publishes one rate, $96/mailbox/month, and only on annual billing. Warmup Inbox includes blacklist and DNS monitoring in every plan. Folderly sells that as two separate products, Inbox Insights and Pulse.

Metric	Warmup Inbox	Folderly	Edge
Entry price	$15/inbox/mo (Basic, billed monthly)	$96/mailbox/mo (annual billing only)	Warmup Inbox
Top publicly listed plan	$79/inbox/mo, Max tier, 1,000 messages/day	Not publicly tiered; contact sales for scale pricing	Warmup Inbox (transparency)
Free trial	7 days, no credit card required	Not disclosed for the core warmup product	Warmup Inbox
Warmup network	30,000+ real human inboxes across 25+ providers	Warmup plus "everyday maintenance" of sender reputation, network mechanics undisclosed	Warmup Inbox (transparency)
Deliverability monitoring	Built in on every plan: 100+ blacklists checked daily, DNS/SPF/DKIM, inbox placement tracking	Add-on products: Inbox Insights ($79/mo for 100 tests) and Pulse (free real-time alerts)	Depends on need
Contract terms	Monthly or annual, cancel anytime	Annual billing shown publicly, no monthly option disclosed	Warmup Inbox
Best-fit team size	Solo SDRs and agencies scaling inbox count one at a time	Larger B2B teams; case studies span 50 to 250+ employee orgs	Depends on team
Volume pricing	Custom plans at 15+ inboxes, discounts at 50+	Not disclosed; requires demo request	Warmup Inbox

How much does Warmup Inbox cost in 2026?

Warmup Inbox runs $15/inbox/month for Basic (75 messages/day), $49/inbox/month for Pro (250 messages/day), and $79/inbox/month for Max (1,000 messages/day), per Warmup Inbox's pricing page. Annual billing cuts each tier by 20%. Agencies running 15+ inboxes get custom pricing, with further discounts past 50.

Every tier, even Basic, ships with blacklist monitoring, DNS checks, and an API. That matters if you're a cold email agency stacking Warmup Inbox across dozens of client domains. You're not paying extra to see whether a domain got burned.

How much does Folderly cost in 2026?

Folderly lists one public rate: $96/mailbox/month, and only when billed annually, per Folderly's pricing page. There's no published monthly-only option and no disclosed free trial for the core warmup product itself. If you want the DNS-and-placement checker (Inbox Insights) or the spam alert tool (Pulse), those are separate SKUs layered on top.

That pricing structure isn't wrong, but it's opaque compared to Warmup Inbox. You'll talk to sales before you know your real number at scale. For a team that just wants a monthly warmup bill they can cancel, that's friction.

Which tool actually protects deliverability better?

Neither tool wins outright here. Warmup Inbox bundles blacklist and DNS monitoring into the warmup price itself, checking 100+ blacklists daily per its own site. Folderly splits deliverability work into Inbox Insights for pre-send placement testing and Pulse for real-time spam alerts, both sold separately from the warmup engine.

If you want one bill and one dashboard, Warmup Inbox is simpler. If you want a dedicated pre-launch placement test on top of warmup, Folderly's Inbox Insights adds a layer Warmup Inbox doesn't sell as a standalone product. Deliverability below 95% means real meetings never land. On a motion booking dozens of calls a month, a burned domain is not a rounding error.

Which one fits your team and contract needs?

If you're a solo SDR, a founder doing your own outbound, or an agency managing client inboxes one domain at a time, Warmup Inbox is the better fit. Cancel-anytime billing and a 7-day free trial mean you're not locked into a rate before you've tested it against your own sending pattern.

If you're a 50-250+ employee B2B team that wants warmup, placement testing, and spam alerts under one vendor relationship and you're fine with an annual contract, Folderly's suite is built for that. It costs more per mailbox, but it's one procurement conversation instead of three tools.

Frequently Asked Questions

Is Warmup Inbox cheaper than Folderly? Yes. Warmup Inbox's entry tier is $15/inbox/month billed monthly, per Warmup Inbox's pricing page. Folderly's only public rate is $96/mailbox/month, and it requires annual billing, per Folderly's pricing page.

Does Folderly offer a free trial? Not for the core warmup product, based on what's published on Folderly's pricing page. Its separate Inbox Insights tool offers a free tier capped at 2 tests per month.

Can I pay monthly for Folderly instead of annually? Folderly's pricing page shows only one rate, billed annually. No monthly-only option is publicly listed, so you'd need to contact their sales team to confirm.

Do these tools replace good copy and targeting? No. Warmup and monitoring tools protect the inbox you're sending from. They don't fix a list that's poorly targeted or copy nobody replies to.

Modern Inbound has booked 3,000+ qualified B2B meetings for clients, and infrastructure is the first thing we lock down before a single email sends. If you'd rather not manage warmup, deliverability, and sending domains yourself, that's what our setup service handles.

By Rishabh Ambasta, Founder, Modern Inbound.