The email deliverability platform for B2B SaaS teams
Folderly diagnoses why your emails fail and fixes the root causes so your outbound pipeline keeps growing as you scale.
How our email deliverability platform accelerated performance for customers across our case studies
Your outbound stack is missing a layer
Most B2B SaaS teams have a sequencer, a CRM and a data provider. What they do not have is anyone managing the infrastructure all three depend on. Sending works, until it quietly stops working, and by then the quarter is already short.
The bar has moved. Gmail, Yahoo and Microsoft have all tightened sender requirements since 2024, AI-generated outbound is flooding inboxes and training new filters, and reputation now degrades without a bounce or an error to warn you. The first real signal is a reply rate drifting down, which looks like a copy problem long before anyone checks the infrastructure.
Warm-up was sold as the fix. It moves one signal, early, and its effect fades exactly when volume rises and campaigns start mattering to revenue.
How Folderly manages deliverability for SaaS teams
Diagnose
We audit every layer that decides whether your email is delivered: authentication and DNS, domain and IP reputation, sending patterns, list quality, and how each provider currently treats your domains. You get the specific reasons your email is failing, ranked by impact.
Fix
Your specialist works the root causes in priority order. Authentication corrected, damaged reputation rebuilt, sending patterns restructured around what providers reward, and the list problems that keep re-triggering filters removed. Hands-on work, not a report handed back to your team.
Monitor
Seed-based placement testing runs continuously across every major provider, so a shift in how Gmail or Outlook treats your domain shows up the day it happens. You find out while it is still small, not after it has cost you a campaign.
Compound
Because reputation strengthens with consistent, well-managed sending, teams on Folderly see performance improve as they scale rather than decay. Adding mailboxes stops being the thing that breaks your numbers.
What the platform covers
Authentication and DNS
SPF, DKIM and DMARC configured correctly, then kept correct as domains and sending tools change underneath them. Misconfiguration here is the most common cause of sudden, total delivery failure.
Reputation monitoring and repair
Domain and IP reputation tracked across every major provider, with active remediation the moment a signal degrades. Reputation is the slowest thing to rebuild, which is why we do not wait for it to break.
Inbox placement testing
Seed-based testing shows where your email actually lands across Gmail, Outlook and the rest. Acceptance by a receiving server tells you nothing about whether a human will see the message.
Email validation
Validation that checks ESP-specific filters and email protection tools, not just whether an address is syntactically valid. Knowing who you can actually reach protects your reputation as you scale the list.
Blacklist monitoring
Continuous monitoring across the blacklists that affect B2B sending, so a listing is caught early and the cause is identified. Most teams find out they have been listed from a prospect, not from a tool.
A named deliverability specialist
One person accountable for your outcome, not a support queue and not a dashboard you are left to interpret alone. This is the most common reason our customers stay.
Who this is for
Founders, sales leaders and RevOps
Whoever is accountable when the outbound number slips. In most SaaS companies that is three people who each assume one of the others is watching deliverability.
Software companies sending from many domains
Product email, lifecycle email and cold outbound all leaving the building at once, often across several domains and sending tools that nobody owns end to end.
Growth added sending faster than anyone added control
New domains for new segments, new tools bought by new teams, and no single view of which of them are healthy and which are quietly burning reputation.
Folderly case studies
Discover Folderly customers’ success and see how best-practice infrastructure can unlock new levels of email marketing performance.
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(Up to 50 employees)
(Over 250 employees)
(50 to 250 employees)
(50 to 250 employees)
(Up to 50 employees)
(Over 250 employees)
How this compares to setting it up once
Most tools help you get set up. What matters is what happens in the months after.
| What changes | The usual approach | With Folderly |
|---|---|---|
| Adding a domain | A new domain is a fresh gamble | It is onboarded onto a foundation that already works |
| Product and outbound email | Managed separately, judged together | Both watched, because providers score the whole estate |
| Knowing it works | You can see your emails were sent | You can see where they landed, domain by domain |
| Who is watching | Whoever noticed the drop first | A named specialist whose job it is |
| Growing sending | More volume, thinner results | More volume on reputation that keeps improving |
Supported ESPs
Folderly integrates via API and SMTP with major email service providers and supports custom providers too
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Folderly works with any sending architecture
Don't see your ESP on the list? Request a demo and we'll show you how Folderly can work with the tools you already use.
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