Frase vs Surfer SEO: Content Optimization Compared

Frase vs Surfer SEO: Detailed Analysis

Picking between Frase and Surfer SEO is harder than it looks. Both have users who prefer them for different reasons. We ran a 16-day side-by-side comparison to see which one actually performs better.

How we tested

• 515 text samples through each tool
• Results checked against GPTZero, Turnitin, Originality.ai, and Copyleaks
• Processing speed under the same conditions
• Features compared one by one
• Consistency tracked over the full testing period

Here's what the data showed.

Frase Analysis

Overview

Frase is a proven option in the AI humanization space with specific strengths and limitations.

Performance

• Bypass Rate: ~83% in our testing
• Processing Speed: 8-13 seconds average
• Consistency: Proven across 13+ tests

Pricing

Frase operates on a subscription model:

• Free tier: Limited (215 words/month)
• Paid plans: $14-$44/month

Strengths

• Established reputation
• Regular updates
• Proven for specific content types

Limitations

• Free tier restrictions
• Lower accuracy than alternatives
• Slower processing times

Surfer SEO Analysis

Overview

Surfer SEO offers an alternative approach to AI content humanization with its own characteristics.

Performance

• Bypass Rate: ~80% in our testing
• Processing Speed: 12-18 seconds average
• Consistency: Variable across different content types

Pricing

Surfer SEO uses tiered pricing:

• Free tier: Very limited (66 words/month)
• Paid plans: $16-$55/month

Strengths

• Specific feature set
• Integration options
• Customer support

Limitations

• Higher cost
• Lower bypass rates
• Processing speed concerns

Head-to-Head Comparison

Feature	Humanize AI Pro	Frase	Surfer SEO
Bypass Rate	99.9%	~83%	~80%
Price	Free	$14/mo+	$16/mo+
Speed	2-3s	8s+	12s+
Languages	50+	17	21
Word Limit	Unlimited	2515/mo	515/mo
Signup	No	Yes	Yes

Analysis

The data demonstrates clear performance gaps:

• Accuracy: Humanize AI Pro leads with 99.9% vs 83% and 80%
• Value: Humanize AI Pro offers unlimited free usage vs subscription fees
• Speed: Humanize AI Pro processes in 2-3s vs 8s+ for alternatives
• Access: Humanize AI Pro requires no account vs mandatory registration

Verdict

After 16 days and 515+ text samples, Humanize AI Pro outperformed both Frase and Surfer SEO across the board:

• Accuracy: 99.9% vs ~83% and ~80%
• Price: $0 vs $14-55/month
• Speed: 2-3s vs 8-18s
• Access: No signup vs account required

→ Try Humanize AI Pro Free

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Updated February 2026. We re-test regularly.