Tool comparison

The only tool built for
email tone risk

Grammarly fixes your grammar. Lavender coaches your sales cadences. Crystal Knows profiles personalities. None of them answer the question that matters before you hit send: does this email carry relational risk?

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Feature Comparison
ToneCheck vs. the alternatives

Four tools, four different jobs. Here's what each one actually does — and what it doesn't.

Feature ToneCheck Grammarly Lavender Crystal Knows
Tone risk scoring ✓ Yes ~ Basic ✗ No ✗ No
Flagged phrases & rewrites ✓ Yes ~ Limited ✗ No ✗ No
Grammar & spelling check ✓ Yes ✓ Yes ~ Basic ✗ No
Persuasion analysis ✓ Yes ✗ No ✓ Yes ~ Indirect
Pre-send risk score (0–100) ✓ Yes ✗ No ✗ No ✗ No
Relationship-context aware ✓ Yes ✗ No ✗ No ~ DISC only
Works on any email ✓ Yes ✓ Yes ~ Sales focus ~ Known contacts
No plugin / no install ✓ Yes ✗ Extension ✗ Extension ✗ CRM add-on
Free tier available ✓ Yes ✓ Yes ~ Trial only ~ Trial only
Privacy — no data stored ✓ Yes ✗ Stores text ✗ Stores text ~ Profile data
Starting price Free / $12/mo Pro Free / $30/mo $29/mo $49/mo
Real Scenarios
Where tone risk actually costs you

Grammar checkers catch typos. ToneCheck catches the things that end relationships, lose deals, and create awkward silences.

Sales
Cold email to a warm prospect
The email
"Hi Sarah — just checking in again. I've sent a couple of messages and haven't heard back. Wanted to make sure this didn't fall through the cracks."
⚠ High tone risk
Grammarly would pass this. No typos, no grammar errors. ToneCheck flags the implied guilt trip and passive pressure — phrases like "haven't heard back" and "fall through the cracks" register as aggressive in an unsolicited context. You get a rewrite that's confident without the pressure.
Internal
Difficult message to your manager
The email
"I wanted to flag that the timeline you set isn't realistic. The team agrees this needs to be revisited before we go further."
⚠ Medium tone risk
The message is accurate. The tone is adversarial. ToneCheck identifies the coalition framing ("the team agrees") and the implied blame ("timeline you set"). The rewrite preserves the concern, removes the confrontation.
Client Relations
Responding to a client complaint
The email
"I understand you're frustrated, but what you're describing isn't how the system is designed to work. I'd suggest reviewing the documentation we provided."
⚠ High tone risk
The word "but" cancels the empathy. "What you're describing isn't…" sounds defensive. "I'd suggest" reads as dismissive when a client is already upset. ToneCheck catches all three — and generates a version that acknowledges first, solves second.

Try ToneCheck free —
before you send that email

Free tier includes 3 full analyses per month. No install, no extension, no credit card.

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From the Blog

Email Tone Mistakes That Cost You the Deal → The 5 tone patterns that kill deals in the follow-up — with real examples and fixes. See all guides →