Add SocialEcho — AI social media workspace

## Submission

**Tool name:** SocialEcho
**Resource name:** SocialEcho
**Official URL:** https://www.socialecho.net/
**Website:** https://www.socialecho.net/
**Category:**
**Pricing:** Freemium — Free plan available; Basic starts at USD 15/month
**Official pricing evidence:** https://www.socialecho.net/pricing
**Short description:** AI workspace for social publishing, engagement, listening, analytics, and automation.
**Suggested placement:**
**Practical use case:** SocialEcho gives businesses, creators, agencies, and teams one browser workspace for AI-assisted social publishing, engagement, listening, analytics, and automation across 11 social platforms.
**Active and maintained:** Yes
**Affiliation:** Yes — I am submitting on behalf of SocialEcho.
**Disclosure:** Please review this under the same editorial criteria as other entries; no special placement is requested.

- [x] I confirmed the official link loads.
- [x] I searched this repository and did not find an existing SocialEcho entry or submission.
- [x] The description is factual and contains no affiliate link.

No target file is named. Start by inspecting the repository structure and existing SaaS entries to find the appropriate catalog location and formatting; then verify the official URL and pricing link. Done means SocialEcho appears in a suitable category with its factual description and working links.

由索引模型根据 Issue 内容生成。