COMPARISON · HOSTED MODERATION

Deterministic filtering,
not a moderation service.

WebPurify is a hosted moderation service — a profanity and image API plus optional human review. For the high-volume text path, Filter8 is the deterministic engine you can replay and explain — sub-millisecond, flat-cost, and it keeps nothing after the response.

Try the playground → Read the docs

100 free calls · nothing retained after the response · not sent to a third-party model.

Deterministic & replayable

A hosted service returns a decision you take on trust. Filter8's verdict is a pure function of (bundle, input) with a reproducible trace of every candidate and veto.

Flat cost, private

Per-call/service pricing scales with volume and keeps text on someone else's infra. Filter8 is flat at scale — and keeps nothing after the response.

Evasion + PII built-in

26 evasion classes folded before matching, plus phone/email/URL classifiers — including spelled-out — in one sub-millisecond call.

WebPurify vs Filter8 — on text

CAPABILITY	WebPurify	Filter8
Approach	Hosted ML + moderation service	Deterministic engine
Cost model	Per call / service — linear	Flat — marginal cost ≈ compute
Latency	Network round-trip	Sub-millisecond, in-process
Output	Filtered text / flags	Verdict + clean_text
Explainable / replayable	—	✓ reproducible explain trace
Data residency	Text sent to WebPurify	Nothing retained after the response
Evasion (leet · homoglyph · spacing · zero-width)	Model-dependent	26 classes, deterministic
Contact / PII (incl. spelled-out)	Varies	Built-in classifiers
Rating-aware (E–M · minors)	Configurable	Per-rating, per-category ceilings
Image moderation / human review	✓ services	— text engine only

WebPurify is a product of WebPurify. Comparison as of July 2026 based on public information and Filter8's positioning; capabilities and pricing change — verify current details with the vendor before relying on specifics.

WHERE WEBPURIFY WINS

Honest about the trade

WebPurify bundles image moderation and managed human review — a turnkey service with people in the loop for the calls a machine shouldn't make alone. If you want moderation-as-a-service across media with a human backstop, that's their offering. Filter8 is deliberately narrow: the fastest, cheapest, most private path for high-volume text, with a review verdict and webhooks so you can route the hard cases to whatever human queue you already run.

WebPurify comparison questions

Is Filter8 a WebPurify alternative?

For the deterministic text path, yes — replayable, sub-millisecond, flat-cost. WebPurify also does image moderation and human-review services, which Filter8 doesn't; run both if you need them.

Can I self-host?

Not yet — Filter8 is a managed, hosted API today. It keeps nothing after the response and logs offsets, never the text.

Do you offer human moderation?

No — Filter8 is the automated filter. It emits a review verdict and signed webhooks so you can plug the hard cases into your own (or a third-party) human queue.

How does pricing compare?

Per-call/service pricing scales with volume; our marginal cost is compute, so text filtering stays roughly flat. Compare your volume against their rate.

COMPARE MORE

vs Google Cloud NL — per-character text moderation → vs Tisane — NLP abuse-detection API → vs Perspective — the retiring API →

Own your text moderation.

Deterministic, explainable, and flat-cost. 100 free calls, no card.

Get an API key Open the playground