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Scored by model · 2 samples, median · No human review
Rank 55 of 137 · clearer than 60% of the index, 62% of devtools · Reviewed 2026-10-14
Wasmer
wasmer.app
· devtools
73
GRADE B
BAND 68–78
What their homepage claims
“Wasmer: Universal compute. Built for AI”
What that means
They sell a WebAssembly sandbox runtime to run apps locally or on their cloud.
Verdict
Clear enough to tell what the page is offering, but the headline relies on abstractions that could be replaced with a concrete noun for higher clarity.
What to fix first
Ranked by what each change is worth on the composite — the gap to the next rung of the ladder times the dimension’s weight. Computed from the scores, not written by the model; the model’s sentence under each is the action.
-
1Clarity quick win 50 → 65+4.5
Add a concrete product noun in plain words, e.g., "WebAssembly sandbox runtime".
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2Jargon-free quick win 65 → 80+3
Use a plain, concrete noun for the product and avoid abstract phrases.
-
3Call to action quick win 80 → 95+2.3
Place a single, prominent CTA like "Start free – no card required" directly under a concrete product statement.
All three together: 73 → 83. Every dimension one rung up: 83 (grade A). Ceiling is 95.
A plainer headline
Theirs
“Wasmer: Universal compute. Built for AI”
Index’s suggestion
“Run apps in WebAssembly sandboxes locally or on the cloud.”
Built only from facts already on the page — not the company’s words. Shown so the gap between what was written and what could have been written is concrete rather than a number.
Rewrite pack
Five alternative headlines in five angles, a subhead, a call-to-action line, and a line-by-line edit for each of the five dimensions — written only from facts already on wasmer.app, gated like a rating (anything with a struck word is dropped, not sold). Delivered on a private page in about a minute.
One-off. Receipt and VAT by Paddle, our merchant of record. Refund policy.
Where the score comes from
Five dimensions on one ladder — 5 · 20 · 35 · 50 · 65 · 80 · 95 — weighted clarity 30%, specificity 20%, jargon 20%, proof 15%, call to action 15%. For each: the rung the page matched, the words that drove it, and what would reach the next rung. Full rubric →
Clarity30%
50
The headline uses abstract terms like “Universal compute” and “Built for AI” without naming a concrete product category.
Wasmer: Universal compute. Built for AI
Next rungAdd a concrete product noun in plain words, e.g., "WebAssembly sandbox runtime".
Specificity20%
95
Several numerical outcomes are attached to performance and cost, which are concrete and testable.
107× faster startup
Jargon-free20%
65
Uses abstractions such as “Universal compute” and “Built for AI.” The word “Sandbox” is a real concept, but the combination leans abstract.
Wasmer: Universal compute. Built for AI
Next rungUse a plain, concrete noun for the product and avoid abstract phrases.
Proof15%
95
The page includes concrete numbers related to performance and cost.
107× faster startup
Call to action15%
80
There are action prompts like “Run your first sandbox” and “Deploy for free,” which align with the claimed capability.
Run your first sandbox
Next rungPlace a single, prominent CTA like "Start free – no card required" directly under a concrete product statement.
Evidence
Wasmer: Universal compute. Built for AIInitial headline uses abstract terms.
Run your first sandboxCTA aligned with the sandbox capability.
What the scorer was given first 1,500 characters of the homepage text — check the quotes yourself
Wasmer: Universal compute. Built for AI Universal compute. Built for AI Run your apps in lightweight sandboxes: locally or on our cloud. From your first request to your billionth. 107× faster startup 51× smaller 98% lower costs Deploy for free Run your first sandbox Run your first sandbox Choose the languages you already use, copy one command, and run it on your machine. Run Wasmer in: CLI Browser Node.js Python Swift (iOS) Install $ curl https://get.wasmer.io -sSfL | sh Run Cowsay Cowsay Bash Python Node Loading terminal… Run in your browser Backed by Combinator Battle tested in the most challenging environments cloudfare Icon vercel Icon meta Icon MacOs icon Kong icon Runtime Lightweight by design WebAssembly sandboxes start faster, use less memory, and cost less to run than cloud alternatives 107× faster Cold starts Wasmer 107 starts Docker 1 start Relative starts in the same time Memory per instance Sandbox Wasmer 20 MB 20 MB vs. 1,024 MB 98% lower Cost per second Model: 100,000 concurrent sandboxes Wasmer $0.20 $0.000002 /s VPS, VMs & MicroVMs $10.00 $0.0001 /s 1.0s elapsed Registry Your favorite tools, ready to run See all the software that you can run today: Bash wasmer/bash 1.9 MB PHP php/php 85.7 MB QuickJS saghul/quickjs 2.6 MB Postgres wasmer/pglite 74.8 MB Node.js wasmer/edgejs 77.3 MB Python python/python 61.7 MB SQLite sqlite/sqlite 3.6 MB Ruby katei/irb 17.2 MB curl curl/curl 4.5 MB Lua syrusakbary/lua 522 KB C / Clang clang/clang 110.7 MB jq jq syrusakbary/jq
Terms struck
Built for AI
How this compares
60%of the index scores lower
+4vs index mean (69)
+4vs devtools mean (69)
+3vs median (70)
50%of headline words survive
2×independently scored
Strongest: Specificity 95. Weakest: Clarity 50. The 2 passes agreed within 6 points. The band 68–78 is where a re-score of this unchanged page would most likely land: on 42 dry re-scores (12 Oct 2026) the median move was 6 points and one in four moved more than 10. A grade only changes when a new score clears the boundary by 5.
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Provenance
Scored from the live homepage
on 2026-10-14 by gpt-5-nano,
2 independent passes, median taken.
Page snapshot 1c8895be529b.
Rubric 7329c240 (current; what it says).
No person reviewed or edited this score. If the rubric and the score disagree, the rubric wins
and the page is re-scored — not hand-corrected.
Re-scored when the homepage text changes.