Seller Intelligence
Know what to sell by studying what buyers still complain about.
We turn real user frustrations into clear market signals. Each report maps the pain points buyers cannot stop complaining about — so you can build, source, or position a product that actually solves something.
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高尔夫挥杆训练器（Golf Swing Trainer）
水上充气躺椅 / 充气泳池躺椅
防晒补涂工具包(Sunscreen Reapplication Kit)
美白牙贴（Teeth Whitening Strips）
热成像仪（Thermal Imaging Camera）
桌面 CNC 雕刻机
夜视双筒望远镜（数字夜视双筒/Night Vision Binoculars）
高尔夫球手套（Golf Glove）
发光钓鱼浮漂 / 鲶鱼夜钓夜光浮漂
盐水炮弹铅坠 / 圆球钓鱼配重
花园水管喷头（多档可调喷嘴）
户外烧烤炉防护罩（Grill Cover）
耐咬狗狗磨牙骨（尼龙咬胶 / 重度啃咬专用）
果蔬清洗机（涡流清洗+钛电解净化）
便携手持真空封口机
冰袖/防晒袖套(UV防晒冰丝袖套)
空气炸锅
户外露营便携式电源站（Portable Power Station）
智能眼镜
笔记本电脑贴膜/外壳贴纸（含腕托）
便携露营马桶(含尿液凝胶与防漏袋)
太阳能庭院地插灯（路径/景观照明）
电热煮蛋器（7蛋容量）
假发
柔性可弯曲手机三脚架（带蓝牙遥控与手机夹）
激光灭蚊器
0-3岁婴幼儿配方奶粉
户外露营帐篷
电动剃须刀（男士面部/身体电动剃须刀）
猫术后恢复护体衣（伊丽莎白圈替代）
电动头部剃光器(光头剃头仪)
帕尼尼三明治机 / 帕尼尼压烤机
触屏电动烤面包机（智能多士炉）
床垫保护垫 / 加厚舒适层（Mattress Topper）
宠物电视机 / 宠物观影解决方案
扫地机器人
恒温奶瓶 / 恒温温奶器
可折叠多用途手推车（户外/沙滩/带娃拖车）
宠物外出双肩背包(猫咪/小型犬)
滑雪巴拉克拉法帽 / 滑雪面罩
无线橱柜灯（充电式无线橱下灯）
狗狗拔河玩具
天然水晶原石
户外折叠椅
足球回弹训练网（Soccer Rebounder Net）
汽车遮阳板延伸挡片（偏光防眩 · 日夜两用）
狗狗电动磨甲器
可折叠硅胶手机支架（挂屏边/桌面款）
便携家用投影仪
硅胶婚戒
瑜伽垫
猫用激光逗猫棒
水槽下收纳架
碗碟沥水架
水槽上方切菜板
硅胶厨具套装
How this works
User research at scale
We collect thousands of real user voices from online communities — capturing frustrations, comparisons, and unmet needs in their own words.
Pain point mapping
Signals filtered for genuine dissatisfaction: recurring complaints, abandoned products, features buyers keep asking for.
Seller verdict
Insights translated into direct market entry guidance: what to build, what to avoid, what positioning wins.
Frequently Asked Questions
What is WhatToSell?
WhatToSell is a product research tool for e-commerce sellers. We synthesize real user pain points into actionable market entry guidance — opportunity scores, complaint breakdowns, and seller verdicts.
How is this different from product reviews?
Review sites write for buyers. We write for sellers. We don't tell you which product is best to buy — we identify where buyer frustration is highest and whether there's a real opportunity to enter that market.
How do you gather the insights?
We collect posts from topic-specific online communities where buyers describe real frustrations in detail — things they wish existed, products they've given up on, and complaints that repeat across thousands of conversations.
What does the Opportunity Score mean?
The Opportunity Score (1–10) reflects how strong the market gap is. It weighs complaint frequency, how actively buyers seek a better solution, and how feasible it is to build one. A score of 8+ means persistent, addressable demand.
Who is this for?
Amazon FBA sellers, Shopify store owners, product designers, and anyone sourcing goods who wants to understand what buyers actually need — not just what already exists.
Is this free?
Yes, all reports are free to read. We publish new product analyses regularly.