by Alexandre Amato 5 (1 reviews)

SpamAnvil – AI Anti-Spam & Comment Spam Protection

Name: SpamAnvil – AI Anti-Spam & Comment Spam Protection
Rating: 5.0 (1 reviews)
Author: Alexandre Amato

Free AI anti-spam & Akismet alternative. Uses ChatGPT, Claude, Gemini & other LLMs to block comment spam that traditional filters miss.

SpamAnvil ranks #24,249 among WordPress.org plugins with 30+ active installations, is #931 of 2,900 in the Discussion & Community category, a 5/5 rating from 1 reviews, and was last updated Aug 18, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Compatible with WP 7.1.2

v1.18.1 Current Version v1.18.1

Updated 1 month ago Last Update on 18 Aug, 2026

Refreshed 8 hours ago Last Refreshed on

#931 of 2,900 in Discussion & Community Top 50% by installs Downloads -6.6% this week

View on WordPress.org

Rank

#24,249

— No change

Active Installs

30+

+50%

KW Avg Position

81.8

98.2 better

Downloads

2.5K

+21 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (1 reviews)

Next Milestone 40

Total Progress 70%

30+ 40+

6,286

Ranks to Climb

Growth Needed

8,000,000

Active Installs

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Rank Changes

Current #24,249

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

5.0

1 reviews

Overall 100%

1 (100%)

0 (0%)

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Plugin Details

Version: 1.18.1
Last Updated: Aug 18, 2026
Requires WP: 5.8+
Tested Up To: 7.1.2
PHP Version: 7.4 or higher
Author: Alexandre Amato

Support & Rating

Rating: ★ ★ ★ ★ ★ 5
Reviews: 1
Support Threads: 0
Resolved: 0%

Keywords

AI antispam comment spam moderation spam protection

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Frequently Asked Questions

Common questions about SpamAnvil – AI Anti-Spam & Comment Spam Protection

Yes, 100% free and open source. There is no premium version. You only need an API key from an AI provider, and free options are available (e.g., OpenRouter with free Llama models).

Akismet uses a centralized cloud service owned by Automattic. It requires a paid subscription for commercial sites, and all your comments are sent to Akismet's servers. SpamAnvil lets you choose your own AI provider, works with free models, keeps you in control of your data, and uses true AI understanding instead of statistical pattern matching.

Antispam Bee uses traditional techniques like honeypot fields, country blocking, and regex rules. These work for basic spam but miss sophisticated attacks. SpamAnvil adds AI analysis that actually reads and understands comments in context, catching spam that looks legitimate to keyword-based systems.

For free usage: OpenRouter with the free Llama 3.1 8B model works surprisingly well for spam detection. For best accuracy: OpenAI GPT-4o-mini offers the best quality-to-price ratio. For privacy: Google Gemini or a self-hosted model via the Generic OpenAI-compatible option. For maximum reliability: Configure a primary + fallback provider so spam checking never stops.

No. In the default async mode, comments are held as "pending" and processed in the background via WP-Cron every 5 minutes. Your visitors experience zero added latency. There's also a sync mode available if you prefer instant results.

SpamAnvil has built-in resilience: failed requests are retried up to 3 times with exponential backoff (1 min, 5 min, 15 min). You can also configure a fallback provider that kicks in automatically when the primary fails.

Comment content is sent to your chosen AI provider for analysis - this is the only external data transmission. API keys are encrypted with authenticated AES-256-GCM in the database (or can be defined in wp-config.php to never touch the database). IP addresses are stored as salted, keyed hashes (HMAC-SHA-256, not reversible without your site's secret) and displayed masked in the admin panel.

Yes. SpamAnvil hooks into WordPress's standard comment system, which WooCommerce product reviews also use.

Yes! AI language models understand comments in virtually any language. This is a major advantage over keyword-based spam filters that only work for English.

SpamAnvil uses 6 layers of prompt injection defense: (1) comment content is wrapped in <comment_data> boundary tags, (2) the system prompt explicitly instructs the AI to ignore instructions within comments, (3) heuristic patterns detect common injection phrases and raise the spam score, (4) responses are validated as strict JSON, (5) LLM temperature is set to 0 for deterministic behavior, (6) content is truncated at 5,000 characters.