
基于对象存储的图数据库,为智能体记忆与上下文而生
| 维度 / 指标 | ![]() | ![]() |
|---|---|---|
| 官方域名 | goodnotes.com | hydradb.com |
| 定价模式 | 免费增值,免费试用 | 免费增值,定价请咨询 |
| 月访问量 | 322.73万 (3,227,341) | 2.96万 (29,635) |
| 月度环比流量变化 | +31.47万 (+10.8%) | +1612 (+5.8%) |
| 主要市场与份额 | 🇺🇸 美国 (33.8%) | 🇮🇳 印度 (65%) |
| 直接访问 / 月 | 163.89万 | 1.71万 |
| 用户评分 | 4.4 | 4.4 |
| 支持的平台 | 网站 | 网站 |

手写笔记、PDF 批注与 AI 学习工具,都在同一块画布上
低延迟墨迹、防误触手掌识别、划掉即擦除以及手写转文字,让书写接近纸笔手感。
导入合同、论文或教材,用手直接标注,批注可搜索并可干净导出。
同时检索键入文本、手写与速写,并把笔记转成摘要、思维导图或结构化计划。
在共享笔记本、文档和白板上同时协作,不再有版本冲突或反复传文件。

基于对象存储的图数据库,为智能体记忆与上下文而生
图数据、预写日志、值与索引全部存放在 S3 兼容存储中,并采用热/温/冷分层策略,相比常驻内存的图数据库大幅降低基础设施成本。
一次查询即可同时进行图遍历与向量、BM25、重排序搜索,智能体无需再编排四套独立系统。
所有变更都被记录,智能体可以回溯发生了什么、何时发生、顺序如何,从而支持可审计性与长期运行的智能体流程。
通过 Bolt 提供 OpenCypher,并配有 HTTP API 与 SDK,熟悉属性图的团队可以快速上手。
专项更强将课程材料转变为互动式AI学习工具,不过对手写数字笔记本的关注相对较少。

专项更强Stronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
专项更强Stronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
专项更强Converts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
专项更强Converts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
将笔记整理成互相连接的类型化对象,而非传统笔记本,但缺乏手写笔触支持。
Pinecone is a managed vector database and AI knowledge platform for building retrieval-augmented generation (RAG), semantic search, and agent memory. It stores vector embeddings at scale, makes writes searchable within seconds with no index tuning, and keeps p99 latency steady as data grows. Pinecone powers products for more than 10,000 customers and over a million developers worldwide.
Pinecone is a managed vector database and AI knowledge platform for building retrieval-augmented generation (RAG), semantic search, and agent memory. It stores vector embeddings at scale, makes writes searchable within seconds with no index tuning, and keeps p99 latency steady as data grows. Pinecone powers products for more than 10,000 customers and over a million developers worldwide.
专项更强Uses an infinite visual canvas for note organization, but lacks Goodnotes' paper templates and PDF annotation polish.
免费 / 开源Honcho is an open-source memory layer for AI agents. It ingests messages, indexes them, and runs background reasoning so agents can recall who a user is, what happened before, and what to do next — across sessions, tools, and machines.