Fomo vs ProveSource
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedFomo compared with ProveSource
ProveSource is the direct competitor and the cheaper one, with a free plan under 1,000 monthly unique visitors, $24 a month for 20,000, unlimited impressions on every tier, and six notification types. Fomo costs more and adds A/B testing, an ROI dashboard, roundups, inline notifications, and a decade more history. Take ProveSource if you want notifications running cheaply on a small or mid-sized site; take Fomo if you intend to measure and optimise the effect rather than just switch it on.
ProveSource compared with Fomo
Fomo is the premium alternative at $25 to $149, metered by notification volume, adding A/B testing, an ROI dashboard, roundups, inline notifications, and unlimited websites from $75. ProveSource is cheaper for most site sizes, offers a free plan, and gives unlimited impressions with every feature on every tier. Take ProveSource if you want notifications running well at low cost; take Fomo if you intend to split test them and attribute revenue.
Choose Fomo if
Ecommerce stores and high-traffic landing pages where conversion rate is measured seriously, and buyers who want notification targeting, A/B testing, and revenue attribution rather than the cheapest possible popup script.
Choose ProveSource if
Small and mid-sized ecommerce stores, course sellers, and funnel builders who want live activity notifications running cheaply, especially sites under 20,000 monthly unique visitors where the $24 tier or the free plan covers everything.
Side by side
13 attributes| Attribute | Fomo | ProveSource |
|---|---|---|
| Category | Social Proof | Social Proof |
| Starting price | $25 per month (Starter) (14 days trial) | $0 (free under 1,000 monthly unique visitors), then $24 per month billed yearly (Starter) (free plan available) |
| Pricing model | Subscription metered by monthly notification volume, with website count as a tier gate; four tiers including a custom unlimited plan. | Freemium subscription metered by monthly unique visitors with unlimited impressions on every tier; five published tiers plus a custom Enterprise plan. |
| Free plan | No | Free covers 1,000 monthly unique visitors with unlimited impressions, all features included, live chat support, and ProveSource branding on notifications. |
| Free trial | 14 days on all tiers, no credit card required | No separate trial; the free plan is the evaluation path |
| Best for | Ecommerce stores and high-traffic landing pages where conversion rate is measured seriously, and buyers who want notification targeting, A/B testing, and revenue attribution rather than the cheapest possible popup script. | Small and mid-sized ecommerce stores, course sellers, and funnel builders who want live activity notifications running cheaply, especially sites under 20,000 monthly unique visitors where the $24 tier or the free plan covers everything. |
| Setup time | Under an hour for a basic setup. Install the script or connect the ecommerce integration, pick notification types, and switch it on. Configuring page rules, geo targeting, and timing properly takes considerably longer and is where the value actually is. | Under an hour. Paste the script or connect the platform integration, pick notification types, and switch it on. The vendor's claim of setup in minutes is fair for a basic configuration; tuning the timing rules properly takes longer. |
| Learning curve | Low to install and moderate to run well. More than 30 display settings sound trivial until you realise that frequency and timing decide whether notifications feel like momentum or harassment. The A/B testing and ROI dashboard require enough discipline to actually read them. | Low. The interface is a settings panel rather than a platform, and the only genuinely consequential decisions are notification frequency, whether to hide on mobile, and whether to anonymise conversion details. |
| Platforms | JavaScript site script, Shopify and WooCommerce integrations, More than 106 native platform connectors, Webhooks and Zapier, Inline page-embedded notifications from the Business tier | JavaScript site script, Shopify, WooCommerce, Wix, and Squarespace integrations, Kajabi, Thinkific, and ClickFunnels integrations, Zapier and webhooks, Automatic custom web form tracking |
| Compliance | GDPR-facing privacy policy, No SOC 2 or ISO 27001 certification published | GDPR-facing privacy policy, Conversion anonymisation controls, No SOC 2 or ISO 27001 certification published |
| Founded | 2016 | 2017 |
| Headquarters | United States | Be'er Sheva, Israel |
| Ownership | Owned by Relay Commerce following a June 2022 acquisition | Privately held; funding not published |
Strengths and limitations
Fomo
Strengths
- The most mature product in the notification segment, with a decade of operating history and a patented event generation approach.
- A/B testing against a genuine control plus an ROI dashboard, so the conversion claim can be verified on your own traffic instead of taken on faith.
- Roundup notifications solve the hardest problem for lower-volume sites, aggregating activity instead of showing an embarrassingly sparse stream.
- Fomo Inline places proof inside the page layout, which avoids the popup fatigue that undermines the entire format.
Limitations
- It collects nothing. Fomo displays activity and does not gather, store, or publish testimonials, so it cannot be your only social proof tool.
- No free plan, and the 14-day trial is the only way to evaluate it without paying, whereas ProveSource runs free under 1,000 monthly unique visitors.
- Inline notifications, arguably the best format on offer, require the $75 tier and are absent from the $25 plan.
- Starter covers one website only, so a second site triples the cost regardless of usage.
ProveSource
Strengths
- A permanently free plan for sites under 1,000 monthly unique visitors with all features included, which no direct competitor offers.
- Unlimited impressions on every tier, so notification frequency is a design decision rather than a budget one.
- Six notification types including Combo aggregates and a live visitor counter, giving lower-volume sites an honest way to show momentum.
- Branding removal at the first paid tier of $24, earlier than most tools in the wider category.
Limitations
- It collects nothing. There is no testimonial collection, storage, or wall of love, so this cannot be your only social proof tool.
- No documented A/B testing and no revenue attribution dashboard, so you are trusting that the notifications help rather than measuring it.
- Metering by monthly unique visitors means your own traffic growth raises the bill even when notification usage is flat.
- Notification popups are a maturing tactic with thinning returns as visitors grow familiar with the format.
Pricing compared
Fomo
Subscription metered by monthly notification volume, with website count as a tier gate; four tiers including a custom unlimited plan.
- Starter$25
- Business$75
- Pro$149
- UnlimitedCustom
Fomo is priced at a premium to the notification field and mostly justifies it through measurement rather than display. A/B testing against a real control and an ROI dashboard that attributes revenue are the features that turn this from a decorative widget into a decision you can defend, and no cheaper competitor offers either properly. The 106-plus integrations and API access on the $25 tier are generous. Where it looks expensive is the entry: $25 for one website with no inline notifications and no free plan, against ProveSource at $24 for 20,000 monthly unique visitors with a free tier below that. If you are going to measure the impact and act on the result, Fomo is worth the difference. If you want a purchase popup on a small store and will never look at the dashboard, you are paying for analytics you will not open.
ProveSource
Freemium subscription metered by monthly unique visitors with unlimited impressions on every tier; five published tiers plus a custom Enterprise plan.
- Free$0
- Starter$24
- Growth$45
- Monster$91
- Gorilla$183
- EnterpriseCustom
ProveSource is the value pick in notifications and the structure is what makes it so. Unlimited impressions on every tier including free means you are never deciding whether to show a notification because of budget, and a permanently free plan under 1,000 monthly unique visitors lets a new store run the tactic from day one at no cost. All features on all plans is a refreshing contrast with the add-on menus elsewhere in this category. What you do not get is proof that any of it works: there is no documented A/B testing and no revenue attribution dashboard, which is exactly where Fomo spends its price premium. Visitor metering also means the bill scales with your traffic rather than your usage, so at 500,000 monthly uniques the $183 figure is worth comparing carefully against Fomo's $149 for 300,000 notifications. For a site under 50,000 monthly visitors it is the obvious choice.
Editorial verdict on each
Fomo
Fomo is the grown-up in the notification half of this category. Ten years of operating history, a patented event engine, roundups that let low-volume sites show momentum honestly, inline notifications that dodge popup fatigue, and, most importantly, A/B testing plus revenue attribution so you can find out whether any of it works on your traffic. Metering by notification rather than by visitor is the fairer model. The caveats are worth taking seriously: there is no free plan, the $25 tier covers one website and withholds inline notifications, the format's returns have thinned as visitors grew used to it, and ownership now sits with an acquisitive roll-up rather than founders who run stores themselves. Buy it if conversion optimisation is a discipline in your business and you will act on the dashboard. If you want a cheap purchase popup and nothing more, ProveSource costs less and does that adequately, and neither tool is a substitute for actually collecting testimonials.
Read the full Fomo profileProveSource
ProveSource is the sensible default for anyone who wants activity notifications without turning it into a project. A permanently free tier under 1,000 monthly unique visitors, unlimited impressions on every plan, branding removal at $24, six notification types including the Combo aggregates that let small stores show momentum honestly, and a genuinely deep set of timing, targeting, anonymisation, and localization controls including right-to-left support. The gap against Fomo is measurement: there is no documented split testing and no revenue attribution, so you are running the tactic on faith rather than evidence, and visitor metering means growth costs you money. Neither issue matters much on a site under 50,000 monthly visitors, where this is comfortably the best-value option. What it will never do is collect a testimonial, so treat it as the conversion layer sitting on top of whatever tool actually gathers your customer proof.
Read the full ProveSource profileFomo profile last reviewed 2026-08-22; ProveSource last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.