Folderly vs WarmEnvelopes
Folderly
folderly.comWarmEnvelopes
warmenvelopes.comSide by side
| Figure | Folderly | WarmEnvelopes |
|---|---|---|
| Price from | $4.67/mo | €9/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 12 | 2 |
| Spec score · Email Warmup Software | 9.1 (#1) | 8.4 (#5) |
| Purpose | Folderly describes its suite as AI and email deliverability tools for B2B teams that help draft campaigns, check sending setups, and monitor delivery. | WarmEnvelopes schedules real warm-up emails from a configured domain through the user's Resend account to recipient inboxes they control, to build sending history. |
| What it does | Folderly is a B2B email-deliverability suite for diagnosing, fixing and monitoring inbox placement. | WarmEnvelopes builds sending history for a domain by sending genuine emails through the customer's Resend account to inboxes the customer controls. |
Plans
Folderly
- Inbox Insights FreeFree
- PulseFree
- Folderly — 25–99 mailboxes$56 a year
- Folderly 25–99 mailboxes (yearly)$56 a month
- Folderly — 10–24 mailboxes$72 a year
- Folderly 10–24 mailboxes (yearly)$72 a month
- Inbox Insights Monthly$79 a month
- Folderly — 1–9 mailboxes$96 a year
- Folderly 1–9 mailboxes (yearly)$96 a month
- Inbox Insights Yearly$799 a year
In their own words
Folderly
Folderly is a suite of AI and email deliverability tools for B2B teams. It combines campaign drafting with checks and monitoring intended to help assess email placement and sender reputation. Inbox Insights reviews inbox placement along with sending IP and domain signals before a campaign; its free plan includes 2 tests per month. Pulse tracks placement over time, and real-time alerts are available for free. Folderly AI turns an offer, audience, and goal into a campaign draft and directs users to relevant checks. Other tools cover DMARC reports, public DNS and IP inspection, email HTML previews, and real-message testing; DMARC is a pilot and Mirror is in beta. Folderly says it connects to email service providers through API and SMTP, supports custom providers, and names Amazon AWS, Sendpulse, Elastic Email, Google Workspace, SendGrid, and Microsoft Outlook. Product availability, access, and plans vary by product. Listed options include Inbox Insights Monthly at $79 a month for 100 tests and Inbox Insights Yearly at $799 a year for 100 tests per month. Folderly mailbox plans list a minimum commitment and per-mailbox monthly amounts, billed yearly.
WarmEnvelopes
WarmEnvelopes is a web service that schedules genuine warm-up emails from a configured domain through the user’s Resend account. Messages go to inboxes the user controls, or whose owners have consented, to build sending history. Setup requires a verified sending domain and a Resend API key, with a separate key stored for each domain. A scheduler runs every 30 minutes and spreads the daily target across the day. Pro users can set starting volume, daily increases, and a maximum. The library contains more than 1,000 independently written messages in several languages, varying templates and sender names. Each send records its sender, template, delivery status, and errors, while the dashboard shows daily progress. The Free plan costs 0.00 EUR and permits four emails per day per domain across up to 10 domains. Pro costs €9 a month and supports up to 1,000 daily emails. A separate checker reviews SPF, DKIM, DMARC, MX, and blocklist status.