Last updated 08-09-2026
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Spiral
Give Spiral samples of your published writing and it maps your sentence rhythm, word choices, and opener patterns into a reusable style profile. From there you draft tweets, landing pages, newsletters, and essays that read like you wrote them, not like a default chatbot.
Generic AI writers output polished but interchangeable copy because they never measure your prose fingerprint. Spiral applies stylometry, the linguistic analysis method used in authorship studies, to quantify how you write and enforce that signature across formats. That makes it a stronger fit for marketers and founders who need one voice across social, email, and long-form without hand-tuning prompts on every draft.
Content marketers, newsletter authors, and agency teams connect social channels or upload brand docs, then run live drafts with editorial feedback alongside their AI agents. Personal plans start at $15 per month, with team workspaces at $25 per user and an Every bundle at $30 per month that includes Spiral plus Cora, Monologue, Sparkle, and Proof.
Style Engine measures sentence length, punctuation, and word ratios from your writing samples
Personal plan at $15 per month includes MCP, API access, style engine, and knowledge base
Team plan at $25 per user per month adds shared workspaces and higher usage limits
Runs multiple drafts at once with real-time editorial feedback during live writing sessions
Formats output for tweets, blogs, LinkedIn posts, and raw LLM output with channel-specific metrics
Stylometry measures your writing fingerprint instead of relying on generic prompts.
MCP and API access on paid plans integrate Spiral into agent workflows.
Every bundle at $30 per month adds four companion apps beyond Spiral alone.
Personal plan has basic usage limits that may cap heavy daily drafting.
Team pricing is per user at $25 per month, which adds up for larger teams.
Requires writing samples or connected channels before the style engine can match your voice.
How much does Spiral cost?
Spiral Personal costs $15 per month. The Team plan is $25 per user per month with shared workspaces. The Every bundle, which includes Spiral plus other Every apps, costs $30 per month.
Can Spiral match my brand voice?
Yes. Spiral Writing Styles let you upload your own writing samples or reference authors, then apply that measured voice across every draft Spiral produces for you.
What is stylometry in Spiral?
Stylometry in Spiral is the analysis of your sentence length, punctuation frequency, and word choice patterns. Spiral uses those measurements to write new copy that carries the same signature as your published work.
Does Spiral work with AI agents?
Yes. Spiral is built as a writing partner for you and your agent, with MCP and API access on paid plans and a shared workspace where coworkers and agents edit in real time.
What content types does Spiral write well?
Spiral handles short-form social posts, landing page copy, presentations, essays, newsletters, and meeting recaps. Every uses it internally for published work across those formats.