FormSentry spam blocker vs Inbox Shield
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Only Inbox Shield lists a free plan. Paid plans start at $2.99/month for FormSentry spam blocker and $4.99/month for Inbox Shield.
- FormSentry spam blocker lists 3 features Inbox Shield’s listing doesn’t mention, including AI-powered detection, Risk reports, Suspicious activity.
Head to head
Starter
- · 3-day submission history
- · 35 submissions/mo
- · Full spam protection
Pro
- · 3,000 submissions/mo
- · 30-day submission history
- · Email support
- · Full spam protection
- · No FormSentry Badge
- · Sensitivity controls & custom lists
Business
- · 10,000 submissions/mo
- · 90-day submission history
- · Full spam protection
- · No FormSentry Badge
- · Priority support
- · Sensitivity controls & custom lists
Basic
- · Block bots and phishing attempts
- · Message log with spam scores
- · Protect 50 messages/month
- · Spam protection on contact forms
Premium
- · Custom keyword filters
- · Everything in Free
- · Unlimited protected messages
- · Whitelist trusted senders
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureSpam on your contact form wastes time, triggers unwanted email flows, and buries real customer messages. FormSentry checks every submission using behavioral signals, email reputation, and content analysis; then blocks the junk and lets real messages through. Works with contact forms, blog comments, Shopify Forms App and popular form builders.
InboxShield protects your contact form from unwanted messages, fake inquiries, and repeated promotional submissions. You can review message activity, adjust protection settings, manage keyword categories, and keep real customer inquiries easier to notice.
- Works invisibly. No CAPTCHAs, puzzles, or changes to your forms
- Scores every submission and blocks spam before it reaches your inbox
- Every block comes with a spam score and clear reasons you can review
- Allowlists and blocklists for specific emails, domains, and IP addresses
- Protect your contact form from unwanted messages
- Review blocked and allowed messages in one dashboard
- Adjust protection levels to control message filtering
- Customize keyword filters to match your business needs
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  FormSentry spam blocker |  Inbox Shield |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | FormSentry spam blocker | Inbox Shield |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | FormSentry spam blocker | Inbox Shield |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $2.99/month(ahead) | $4.99/month |
| Longest free trial | 7 days | 7 days |
| Plans listed | 3 | 2 |
Listing
| Measure | FormSentry spam blocker | Inbox Shield |
|---|---|---|
| Shopify category rank | #153 | #153 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Mar 20, 2026 | Jul 30, 2026 |
| Languages | 10 | 1 |
| Developer | StoreBeam | Acrosoft |
FAQ
FormSentry spam blocker and Inbox Shield: common questions
- Is FormSentry spam blocker or Inbox Shield cheaper?
- Only Inbox Shield lists a free plan. Paid plans start at $2.99/month for FormSentry spam blocker and $4.99/month for Inbox Shield. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- FormSentry spam blocker lists 3 the others don’t mention, such as AI-powered detection, Risk reports, Suspicious activity. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.