How do their growth rates compare?

Perplexity has a month-over-month growth rate of -3.7%; WriteABookAI has -14.1%.

How does pricing compare?

Perplexity: Freemium. Offers a permanent Free tier with unlimited Quick Searches, 3 Pro Searches per day, and 1 Deep Research query per month; Perplexity Pro costs $20/month ($200/year) and Perplexity Max costs $200/month ($2,000/year) for individuals. Team plans start at $40/seat/month ($400/seat/year) for Enterprise Pro and $325/seat/month for Enterprise Max, alongside usage-based Sonar API billing. WriteABookAI: One-time purchase (no subscription). WriteABookAI advertises a one-time purchase instead of a subscription, with no hidden fees. Plan options are sized to your book's length and grant a dedicated access timeframe plus permanent availability of your saved work for viewing and export. Specific prices are shown as dynamic options on the pricing page. A 30-day refund is offered provided you have not written most of the book or already exported it.

What are alternatives to Perplexity and WriteABookAI?

Other tools in related categories include ChatGPT, Google Gemini, Claude, Grok, Genspark.ai.

Perplexity vs WriteABookAI — Traffic (88.31M vs 6.89K), Pricing & Verdict

Open AI Tools

Perplexity vs WriteABookAI — Traffic (88.31M vs 6.89K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Perplexity	WriteABookAI
Official Domain	perplexity.ai	writeabookai.com
Pricing Model	Freemium	One-time purchase (no subscription)
Monthly Visits	88.31M (88,310,223)	6.89K (6,885)
MoM Traffic Delta	-3.39M (-3.7%)	-1.13K (-14.1%)
Primary Market & Share	🇺🇸 United States (25.5%)	🇺🇸 United States (37.4%)
Direct Visits / mo	63.32M	2.67K
User Rating	4.7	4.2
Supported Platforms	Website	Website

Perplexity

Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models.

Deep Research Autonomous Reports

Executes multi-step iterative web and document research across hundreds of sources, cross-checking facts and generating structured, citation-backed analytical reports that can be exported as PDFs or shared as interactive Perplexity Pages.

Multi-Model Routing & Model Council

Lets Pro and Max subscribers switch dynamically between Perplexity's in-house Sonar models and top external models (including Claude 4, o3-pro, and Gemini) or compare multi-model reasoning outputs side by side.

Perplexity Spaces & Hybrid RAG

Provides dedicated project workspaces where users upload local PDFs, spreadsheets, and text files, configure custom assistant instructions, and run queries that combine private document retrieval with live internet search.

Perplexity Computer & Comet Assistant

Extends Perplexity from passive Q&A into agentic execution, turning high-level user requests into completed workflows, multi-tab browser actions, and automated data synthesis via the Comet ecosystem.

Strengths & Pros

+Every generated statement links directly to numbered, verifiable web or document sources, drastically reducing ungrounded LLM hallucinations.
+Deep Research mode delivers comprehensive, multi-page synthesis reports at a fraction of the time required for manual desk research.