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How much is an online tool, web app, or browser extension worth? Multiples typically range from 30x to 55x monthly SDE depending on subscription MRR quality, churn rate, LTD exposure, API dependency, and codebase documentation. This guide breaks down current valuation multiples by size tier and explains what moves a tool or app multiple up or down. See also the full website valuation guide, the SaaS valuation multiples guide, and the eCommerce valuation multiples guide.
Online tools and web apps are priced as a multiple of monthly Seller's Discretionary Earnings (SDE) \u2014 monthly revenue minus hosting and infrastructure costs, platform fees, contractor costs, and any paid tool subscriptions, with owner time added back at a notional rate. LTD (lifetime deal) revenue is excluded from SDE because it is non-recurring. The ranges below assume verified subscription MRR via payment processor exports, a disclosed LTD user count, and no undisclosed API or platform policy issues.
| Size Tier | SDE Multiple |
|---|---|
| Micro-tool (under $500 SDE/mo) | 25–38x monthly SDE |
| Small tool ($500–$2k SDE/mo) | 33–48x monthly SDE |
| Established tool ($2k–$5k SDE/mo) | 40–55x monthly SDE |
| Larger tool ($5k+ SDE/mo) | 45–60x monthly SDE |
Ranges reflect direct buyer-to-seller deals. Tools with heavy LTD user exposure, critical single-API dependencies, or single-developer codebases typically land in the lower half of each tier.
The same tool with 35% of users on LTD plans and a critical OpenAI API dependency would likely justify only 32–36x, producing a valuation of $64,000–$72,000 — a 20–30% discount for LTD and API risk.
Monthly churn rate is the primary valuation driver for subscription tools and apps because it determines how long customers stay and how much revenue they generate over their lifetime. Each percentage point of additional churn above 2% reduces justified multiples by roughly 5–10x.
| Monthly Churn | Year-1 Retention | Multiple Impact |
|---|---|---|
| Under 1% | 88%+ | +15–25% premium above base multiple |
| 1–2% | 79–88% | Base multiple range |
| 2–4% | 62–79% | 0–15% discount to base multiple |
| 4–6% | 49–62% | 15–30% discount; growth dependency |
| Over 6% | Under 49% | Significant discount or pass; unsustainable |
Churn data should cover a minimum of 6 months of subscription history from the payment processor. Single-month churn figures are unreliable; request a trailing 12-month cohort report.
Lifetime deals sold through AppSumo, StackSocial, Dealify, or direct LTD campaigns are one of the most common valuation risks in tool and app acquisitions. Each outstanding LTD user represents a permanent infrastructure and support obligation with no future recurring revenue.
During due diligence, always request a breakdown of active subscription users vs. LTD users from the payment processor and product database. Calculate the real SDE after subtracting estimated per-user infrastructure costs for the LTD cohort.
Subscription MRR dominance (90%+ recurring, no LTD overhang)
Monthly churn under 2% with consistent 6\u201312 month history
No critical single-API dependency for core functionality
NRR above 100% from plan upgrades or seat expansion
Well-documented codebase with deployment and maintenance runbooks
Under 5 hours/week of owner time
Multi-channel distribution (direct + marketplace reduces concentration)
Stable or growing active user count over the past 12 months
LTD user base over 30% of total active users
Core functionality dependent on a single third-party API
Revenue concentrated in one-time license sales with no recurring base
Monthly churn above 4% with no clear cause or fix
Undocumented codebase or single-developer architecture with no handover plan
Marketplace-only distribution (Chrome Web Store, App Store) with no direct channel
Significant technical debt or outdated dependencies with known vulnerabilities
20+ hours/week of owner time with no documented processes
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