Start with unlimited forms, 500 monthly submissions, file uploads, and a signed webhook. Form Plume gives custom forms a wider runway before integrations and production workflows force an upgrade.
Side by side
Slapform offers a friendly progression from a small free account to inexpensive paid tiers. The important differences are where operational features unlock, how long submissions remain available, and how much traffic each dollar can process.
| Decision point | Form Plume | Slapform |
|---|---|---|
| Free forms and submissions | Unlimited forms · 500 submissions / month A larger allowance for portfolios, campaigns, and client forms. | 2 forms · 50 submissions / month Slapform Basic includes email notifications and spam protection. |
| First paid capacity | 10,000 submissions for $12 / month Unlimited forms, API access, and unlimited signed webhooks. | 500 submissions for $5 / month Apprentice includes 10 forms; the published $5 price is billed annually. |
| Submission retention | 60 days on Free 2 years on Pro | 30 days on Basic Six months on Apprentice, 12 months on Sumo, and 24 months on Grandmaster. |
| File uploads | Included on Free 100 MB on Free and 10 GB on Pro | Not listed in the current plan table Slapform documents cloud submission storage, but its current pricing and feature pages do not promise file uploads. |
| Webhooks and API access | 1 signed webhook on Free Pro adds unlimited signed webhooks, API access, retries, and delivery logs. | Webhooks and API / NPM access on Sumo $13 per month billed annually; webhooks support signatures, retries, logs, and multiple endpoints. |
| Integration routes | Native destinations plus broad automation paths Slack, Discord, Sheets, ActiveCampaign, Mailchimp, Zapier, Make, MindCloud, and signed webhooks | Zapier and custom webhooks Zapier connects to 5,000+ apps; both Zapier and webhooks begin on Sumo. |
| Spam protection | Layered controls with recoverable quarantine Four CAPTCHA choices, honeypots, domain controls, rate limits, blocklists, email hygiene, and adaptive scoring | ML filtering, automatic CAPTCHA, and honeypots Spam protection is included on Basic; the slap_honey trigger provides an explicit hidden-field trap. |
| Exports and data access | CSV export and API on Pro Searchable submissions stay available for two years on Pro. | CSV on Apprentice · API on Sumo Account-data requests are delivered as downloadable JSON under Slapform's privacy process. |
Where Form Plume pulls ahead
Slapform handles straightforward form-to-email workflows well. Form Plume puts more capacity, uploads, and a signed webhook into Free, then bundles the API and external routing into a higher-volume $12 production tier.
Slapform Basic permits two forms. Form Plume does not count forms on Free, so contact, newsletter, application, event, and client-site endpoints can stay under one account without consuming a form quota.
Slapform places Zapier, webhooks, and API or NPM access on its $13 Sumo tier. Form Plume includes one signed webhook on Free and opens unlimited webhooks, API access, and external integrations on Pro.
Form Plume explicitly includes file storage on Free and expands it to 10 GB on Pro. Slapform's current pricing and feature pages emphasize submission storage but do not list file uploads as a plan feature.
Choose by situation
Static-site portfolio with several forms
Form Plume
Unlimited endpoints and ten times the free submission allowance leave room for contact, quote, newsletter, and project forms.
Tiny form needing only email and CSV
Slapform
Its $5 Apprentice tier is a low-cost step when 500 submissions, ten forms, email delivery, redirects, and CSV are enough.
Application form collecting attachments
Form Plume
File uploads are an explicit Free-plan capability, paired with storage limits and a recoverable submissions workflow.
JavaScript project using a dedicated client package
It depends
Slapform maintains an NPM client and supports fetch; Form Plume accepts standard HTML and fetch requests while offering more capacity and earlier webhook access.
FAQ
Form Plume is a strong Slapform alternative for a static site that needs more than a small contact inbox. It accepts normal HTML posts while including unlimited forms, 500 monthly submissions, uploads, and one signed webhook on Free.
Slapform Basic lists two forms, 50 monthly submissions, 30 days of storage, email notifications, and spam protection. Form Plume Free supplies unlimited forms, 500 submissions, 60-day retention, 100 MB of upload storage, and one signed webhook.
Usually, yes. Create a Form Plume form, replace the Slapform action URL with the new endpoint, and test the success and error paths. Standard named inputs continue to post normally; translate Slapform-specific slap_ fields into the corresponding Form Plume settings.
Yes. Slapform webhooks support JSON payloads, custom headers, signatures, retries, delivery logs, and multiple destinations on its Sumo tier and above. Form Plume includes one signed webhook on Free and unlimited signed webhooks on Pro.
Slapform's current pricing table and core feature page do not list file uploads, so confirm availability directly before relying on attachments. Form Plume documents uploads as included on Free, with 100 MB of storage there and 10 GB on Pro.
Slapform uses Zapier to reach more than 5,000 apps and offers flexible custom webhooks, both beginning on Sumo. Form Plume combines native app destinations with Zapier, Make, MindCloud, and signed webhooks, making it the broader routing choice when one automation provider is not enough.
Slapform advertises machine-learning filtering, automatic CAPTCHA protection, and an optional slap_honey honeypot. Form Plume adds selectable CAPTCHA providers, origin controls, rate limits, blocklists, email hygiene, adaptive scoring, and a quarantine where a false positive can be recovered.
Slapform has the lower entry price: Apprentice is advertised at $5 per month when billed annually for 500 submissions. At production volume, Form Plume Pro costs $12 monthly for 10,000 submissions, while Slapform lists 2,000 on $13 Sumo and 10,000 on $24 Grandmaster, with those prices billed annually.
Keep Slapform when its name triggers, NPM package, low-cost Apprentice tier, or existing Zapier setup already fits and your limits are comfortable. Choose Form Plume when unlimited form endpoints, uploads, earlier signed webhooks, longer free retention, or greater production capacity removes a real constraint.
The alternatives directory compares hosted form backends using the same practical criteria: submission limits, retention, uploads, spam controls, webhooks, integrations, and the point at which each feature requires payment.
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