Reviews and Ratings Platform Development
A reviews platform is an aggregator of user ratings for products, companies, or services. Business value: SEO traffic to review pages, monetization via leads to reviewed companies, subscription for businesses managing reputation. References: Otzovik, iRecommend, Trustpilot, TripAdvisor.
Review Structure
A review of product/company contains:
- Numeric rating (1–5 stars, required)
- Title (optional)
- Text (minimum 50–100 characters to pass moderation)
- Pros and cons (separate text fields)
- Photos/video (optional)
- Purchase verification (verified review)
- Experience date (differs from write date)
Review Verification
A verified review is from a user who confirmed purchase/use. Methods:
- Order integration—user who purchased receives invite-to-review
- Document upload—receipt, order screenshot
- Token link sent by business via Trustpilot-like API
Verified reviews display with badge, have higher weight in rating.
Rating Algorithm
Simple arithmetic mean unreliable with few reviews. Better approach—Lower bound of Wilson score confidence interval:
import scipy.stats as stats
import math
def wilson_lower_bound(pos: int, n: int, confidence: float = 0.95) -> float:
if n == 0:
return 0
z = stats.norm.ppf(1 - (1 - confidence) / 2)
phat = pos / n
return (phat + z*z/(2*n) - z * math.sqrt((phat*(1-phat) + z*z/(4*n))/n)) / (1 + z*z/n)
For star ratings (1–5): positive = 4–5 stars, negative = rest.
Additionally: weighted average with time decay—reviews older than 2 years weighted less.
Business Response to Review
Business account can publicly respond to review. Response visible under review, marked "Company Response". Limit: one response per review.
Fight Fake Reviews and Manipulation
- Rate limiting: one review per company per account
- Email verification: review activated only after email confirmation
- IP analysis: multiple reviews from one IP in short period → flag
- NLP detection: text classifier to detect template-like manipulated reviews
- Reverse analysis: sudden positive review spike in 24–48 hours → automatic check
Website Widget for Business
Business can embed widget with overall rating and recent reviews on own site. Implementation: JavaScript snippet with <iframe> or Web Component.
For SEO—integration with structured data AggregateRating schema.org.
Business Subscription
Premium features for companies:
- Notifications on new reviews
- Advanced analytics (rating dynamics, review sentiment)
- Review collection tools (email campaigns with token links)
- Ability to hide old reviews (policy question)
Timeline
MVP (reviews, ratings, company profiles, search): 6–10 weeks. Full platform with verification, anti-fraud, business accounts, widget: 3–5 months.