We make Over the Fence, one of the tools below. Every fact about the other tools is from that tool’s own website, read on October 3, 2026, with the page linked. Prices change, so check them before you buy.
Competitor monitoring for an online store means reading your rivals’ websites, prices, promotions, search rankings and AI answers on a schedule, and noticing what changed. The tools that do it fall into four groups, and they’re built for different jobs:
| Kind of tool | What it watches | Good for | Examples |
|---|---|---|---|
| Price trackers | Prices and stock on rivals’ product pages, often with repricing | Stores that compete on price for the same items | Prisync, Pricefy, Price2Spy, Particl, Competera |
| Page change monitors | Any page you choose, for any change | Knowing within minutes that one page changed | Visualping, Distill |
| AI visibility trackers | Answers to prompts you write, on several AI engines | Measuring AI answers in depth, every day | OtterlyAI, Peec AI |
| Market watch for stores | Prices, promotions, pages, rankings and AI Overviews, weekly | One view of where you stand against named rivals | Over the Fence |
There’s a fifth group you’ll see in “best competitive intelligence tools” lists, Klue and Crayon. They’re built for B2B sales teams, so we cover them last.
At a glance
| Tool | Entry price, monthly billing | Free plan or trial | Checks |
|---|---|---|---|
| Over the Fence | $49 a month, 3 competitors | 3-day trial, card needed | Key products daily, everything else weekly |
| Prisync | $99 a month, 100 products | 14-day trial, no card | 3 times a day |
| Pricefy | Free for 50 products, paid from $49 a month | Free plan | Daily on free, twice a day on paid |
| Price2Spy | Not listed on its pricing page | 14-day trial, no card | Daily, up to 8 times a day on its top tier |
| Particl | $250 a month, 5 competitors | 14-day trial, card needed | Daily |
| Competera | Contact sales | Not stated | Several times a day |
| Visualping | Free for 5 pages, paid from $14 a month | Free plan | Every 2 minutes to monthly |
| Distill | Free for 25 monitors, paid from $15 a month | Free plan | Every 10 minutes at the fastest on paid |
| OtterlyAI | $29 a month, 15 prompts | Free trial | Daily |
| Peec AI | $95 a month, 50 prompts | Trial, no card | Daily |
| Klue, Crayon | Not published | On request | Not stated |
Over the Fence
Market watch for online stores. This is ours.
Over the Fence reads 3, 6 or 12 competitors you name for each site. Every week it reads up to 500, 2,000 or 8,000 pages of each competitor’s website: prices, stock, promotions and new and changed pages. It also reads their Google rankings for your keywords and how often Google’s AI Overviews cite them against you. The rival products that matter most to you (10, 25 or 50 per site) and each rival’s homepage banners are read every day. You get one email a week with three findings at most, and a dashboard with the rest.
- Built for: small and mid-size online stores and the agencies that run them.
- Price: $49, $119 or $249 a month. 3 days free with a card, cancel any time.
- Pick it if: you want prices, promotions, rankings and AI answers on your named rivals in one place, every week.
- Skip it if: you need your prices changed automatically, checks every few minutes or sales estimates. We don’t do those.
Prisync
Price tracking and dynamic pricing. Pricing page
Prisync calls itself “Competitor Price Tracking & Monitoring Software” with a dynamic pricing engine, for “companies from SMBs to Fortune 500 brands.” Its plans start at $99 a month for up to 100 products, with unlimited competitors and price updates 3 times a day. Dynamic pricing starts on its $199 Premium plan and MAP monitoring on its $399 Platinum plan. API access costs an extra 20% of the monthly fee. There’s a 14-day free trial with no card.
- Pick it if: you sell the same products as your rivals and want your prices to move with theirs by rules.
Pricefy
Price monitoring and repricing, with a free plan. Pricing page
Pricefy describes itself as “Competitor Price Monitoring & Repricing Software” for ecommerce businesses and brands, with apps for Shopify and BigCommerce. Its free plan covers 50 SKUs and 5 competitors with one price update a day. Paid plans start at $49 a month for 100 SKUs and unlimited competitors, updated twice a day. Repricing starts on its $99 Pro plan and MAP monitoring on its $189 Business plan. It tracks competitor stock alongside prices.
- Pick it if: you have a small catalog and want to start free.
Price2Spy
Price monitoring, comparison and repricing. Pricing page
Price2Spy is “a price monitoring, comparison, and repricing tool” for online retailers and for manufacturers and distributors. Its pricing page doesn’t list prices for its Starter and Basic tiers, and Premium is “price upon request.” Starter covers up to 10 competitors with daily price change alerts, and the top tier checks up to 8 times a day. Repricing is a separately priced module. There’s a 14-day free trial with no card.
- Pick it if: you want many checks a day and are happy to ask for a quote.
Particl
Competitor tracking with sales estimates. Pricing page
Particl calls itself a “Competitor Tracking Platform” that combines product revenue, pricing, promotions and assortment data across 20,000+ retailers. Plans start at $250 a month, billed monthly, for 5 tracked competitors and 1 user. Data updates daily, and it estimates sales down to the SKU. The 14-day trial asks for a card.
- Pick it if: you want estimates of what your rivals sell, not only what they charge. We don’t estimate sales, and Particl does.
Competera
Price optimization for larger retailers. Competitive data
Competera describes itself as “AI-driven retail price optimization software” and its competitor data as built for mid-to-enterprise retailers. It doesn’t publish prices: its editions say “Contact sales,” and competitor data is billed pay-per-use. It can scan competitors several times a day and captures promotions, discount depth, coupon codes and stock.
- Pick it if: you’re a large retailer that wants prices set by demand models.
Visualping
Page change alerts. Pricing page
Visualping does “website change detection, monitoring and alerts” for individuals, teams and enterprises. Its free plan watches 5 pages with 150 checks a month. Paid plans start at $14 a month for 10 pages, and higher plans check as often as every 2 minutes. Every plan, the free one included, comes with a REST API and an MCP server. Its pricing page lists no keyword ranking or AI answer tracking.
- Pick it if: you need to know within minutes that a specific page changed.
Distill
Page change monitoring, local and in the cloud. Pricing page
Distill monitors web pages for changes. Its free plan has 25 monitors, 5 of them in the cloud, checked every 6 hours at the fastest. Paid plans start at $15 a month for 50 monitors, with cloud checks as often as every 10 minutes. Its pricing page lists no keyword ranking or AI answer tracking.
- Pick it if: you want fine control over exactly which part of which page is watched.
OtterlyAI
AI search monitoring. Pricing page
OtterlyAI is an “AI Search Monitoring Tool” for marketers, small teams and agencies. Plans start at $29 a month for 15 prompts, or $25 a month billed annually. Every plan checks ChatGPT, Google’s AI Overviews, Perplexity and Microsoft Copilot daily. Google AI Mode, Gemini and Claude are paid add-ons. Subscriptions are monthly and can be canceled any time. Its pricing page lists no competitor price or stock tracking.
- Pick it if: AI answers are all you want to measure, across several engines, every day.
Peec AI
AI search analytics. Pricing page
Peec AI offers “AI search analytics for marketing teams.” Plans start at $95 a month for 50 prompts across 3 AI models, or $80 a month billed annually, with unlimited users. It tracks prompts daily, checks AI answers against facts you set about your brand and can import a Shopify catalog to see how each product appears in AI shopping answers. There’s a trial with no card.
- Pick it if: you want deep, daily AI answer tracking with your own prompts and fact checks.
Klue and Crayon
Competitive intelligence for B2B sales teams. Klue · Crayon
Both track competitors’ websites, pricing pages and news, and turn them into battlecards and briefings for sales teams. Klue calls itself “The AI platform for Competitive Intelligence & Win-Loss.” Crayon sends a morning email with the previous day’s most important insights. Neither publishes prices. They’re built for B2B companies with sales teams, not for stores.
- Pick them if: you sell to businesses and your competitors are fought in sales calls.
See your competitors this week
Type your address. We find the sites that turn up next to yours in Google, in your country and language, and read them every week.
3 days free, then from $49 a month. Cancel any time.
How to choose
Start from the question you need answered every week:
- “Are my prices still right?” A price tracker. Add repricing only if you sell identical products in a market that moves daily.
- “Did that page change?” A page change monitor, pointed at the few pages that matter.
- “Do AI answers recommend us?” An AI visibility tracker, if that’s the only question. If you want it beside your rivals’ prices and rankings, a market watch.
- “Where do we stand against these five stores, and what changed this week?” A market watch for stores. That’s the question Over the Fence answers.
Whatever you pick, use it every week. A tool nobody opens is a more expensive spreadsheet nobody fills in.