BettaFish vs TrendRadar: Which Open‑Source Opinion Engine Fits Your Needs?

Core Positioning and Capabilities

BettaFish – multi‑agent professional opinion analysis system (GitHub ★27.7k). Supports deep mining, multi‑dimensional analysis and structured professional reports. Monitors 30+ major platforms (Weibo, Douyin, Xiaohongshu, etc.) with comment‑level extraction.

TrendRadar – lightweight AI hotspot assistant (GitHub ★15.8k). Aggregates 35 platforms (Douyin, Zhihu, Bilibili, Wall Street Journal, etc.) and provides rapid hotspot capture, precise filtering and multi‑device push.

Technical Architecture and Workflow

BettaFish architecture: multi‑agent framework + private opinion database + precise web search + multimodal content analysis + automated report generation + “forum” debate mechanism to reduce hallucination.

Processing flow: user query → multiple agents collaborate → structured report.

Data handling: parses text, images, short videos and structured cards.

TrendRadar architecture: lightweight crawler + AI analysis engine + multi‑endpoint push system.

Processing flow: full‑web crawl → keyword filter → weighted ranking (60 % top‑news, 30 % frequency, 10 % hotness) → push to WeChat, Feishu, email, Telegram, etc.

Data handling: primarily text with basic multimedia extraction.

Core Functions

Information Collection and Monitoring

BettaFish provides 24/7 monitoring with historical back‑track.

TrendRadar offers scheduled crawling plus real‑time incremental monitoring; frequency is configurable.

Intelligent Analysis

BettaFish uses multi‑model fusion (fine‑tuned LLM, statistical models, specialized agents) for deep sentiment, trend prediction and propagation‑path analysis.

TrendRadar employs MCP‑based AI for basic sentiment classification and simple trend charts.

Content Filtering and Customization

BettaFish accepts natural‑language queries with complex logical operators, enabling high‑precision targeting of events, sentiment or user groups.

TrendRadar uses a simple keyword syntax (must, exclude, optional) with moderate precision.

Output and Reporting

BettaFish generates professional structured reports containing charts, sentiment breakdown, trend forecasts and decision recommendations; reports can be downloaded or viewed in a web UI.

TrendRadar produces concise hotspot lists, daily summaries and incremental notifications; output formats include web UI and push notifications.

Applicable Scenarios

BettaFish: brand crisis management, investment decision support, government monitoring, academic research, large‑scale event marketing.

TrendRadar: personal content creation, self‑media operation, corporate market intelligence, casual information aggregation, content platform operation.

Selection Guidance

Choose BettaFish when deep, enterprise‑grade analysis, multimodal understanding and private‑domain data integration are required. Choose TrendRadar for rapid hotspot detection, low deployment cost and multi‑platform aggregation.

GitHub repositories:

https://github.com/666ghj/BettaFish

https://github.com/sansan0/TrendRadar