by Alexandre Amato
0 (0 reviews)
SpamAnvil
Stop comment spam with AI. Uses ChatGPT, Claude, Gemini and other LLMs to catch spam that traditional filters miss. 100% free.
Compatible with WP 6.9.1
v1.2.0
Current Version v1.2.0
Updated 15 hours ago
Last Update on 15 Feb, 2026
Refreshed 8 hours ago
Last Refreshed on
Rank
#48,307
-6278 this week
Active Installs
0+
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No change
KW Avg Position
N/A
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Downloads
91
+43 today
Support Resolved
0%
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No change
Rating
0%
Review 0 out of 5
0
(0 reviews)
Next Milestone 10
0+
10+
5,116
Ranks to Climb
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Growth Needed
8,000,000
Active Installs
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- Version
- 1.2.0
- Last Updated
- Feb 15, 2026
- Requires WP
- 5.8+
- Tested Up To
- 6.9.1
- PHP Version
- 7.4 or higher
- Author
- Alexandre Amato
Support & Rating
- Rating
- ☆ ☆ ☆ ☆ ☆ 0
- Reviews
- 0
- Support Threads
- 0
- Resolved
- 0%
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Frequently Asked Questions
Common questions about SpamAnvil
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 AES-256-CBC in the database (or can be defined in wp-config.php to never touch the database). IP addresses are stored as SHA-256 hashes 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.