
Day One
Journey
Evernote
RedNotebook
OneNote
Laverna
Notezilla
Keep all of your thoughts in one place using Penzu. The app is similar to a journal that you might write in but with a few modern touches that allow you to do everything from sending messages to decorating the pages.

Upload-Post
Buffer
Ayrshare
Hootsuite
getLATE.dev
Postiz
Publer
Postproxy is a unified API to publish, manage comments, direct messages, and reviews across Instagram, TikTok, LinkedIn, X, YouTube, Facebook, Threads, Bluesky, and more.

Which is more popular?
Based on our record, Penzu seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | penzu.com | postproxy.dev |
| Pricing | — | |
| Company | — | Startup from Germany · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Penzu yet.
Postproxy is a social media API for products that need more than publishing. Publish posts, manage comments, DMs and reviews, track post and profile analytics, and receive webhooks across major platforms. Built for SaaS products, automation workflows, and agents that need reliable social media...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Penzu is recommended for users who value privacy in their journaling, prefer a simple and straightforward user interface, and want a digital platform that allows easy access across multiple devices. It's particularly suited for individuals who are keen on maintaining a consistent journaling practice without the need for complex features.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Penzu How It Works
More videos
Postproxy Walkthrough: Social Media API for Publishing, Comments & DMs
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Penzu and Postproxy.
Postproxy's answer:
We were building a product for ads creation at scale with fancy templates management, different platforms with adaptive sizing. Then Nano Banana got released and made a product largely obsolete. Postproxy was basically a part of that product.
Postproxy's answer:
Postproxy is a production-grade social media API for SaaS products, AI agents, and multi-tenant platforms. It provides one API for publishing, comments, direct messages, reviews, analytics, webhooks, and OAuth account connections across Instagram, Facebook, Threads, LinkedIn, TikTok, X, YouTube, Pinterest, Google Business Profile, Bluesky, and Telegram.
Compared with publishing-only APIs and automation tools, Postproxy is designed for customer-facing products that require official platform integrations, explicit delivery statuses, automatic retries, profile-group isolation, predictable pricing, and infrastructure built for production workloads.
Postproxy's answer:
Postproxy combines production-grade publishing infrastructure, engagement, and analytics in one social media API. Every publishing request has an explicit status and human-readable failure reason, failed deliveries can be retried automatically, and the same platform also handles comments, direct messages, reviews, profile analytics, and webhooks.
Postproxy uses official platform APIs and OAuth flows, supports isolated profile groups for multi-tenant products, and provides integrations for n8n, Make, and Zapier, as well as an MCP server for AI agents.
Postproxy's answer:
Postproxy is primarily built for developers and product teams creating SaaS platforms, AI agents, marketing tools, and multi-tenant social media products. It is also used by agencies and automation specialists that manage social accounts for multiple customers.
Individual creators can use Postproxy, but the platform is optimized for software products and production workflows rather than manual social media management.
Share your experience with using Penzu and Postproxy. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Writing a journal entry in Penzu is much like writing a blog post in WordPress, with a WYSIWYG (What You See Is What You Get) interface, complete with a text formatting toolbar. So why not just use Word, WordPress, or...
If you’re looking for security for a more private journal, then Penzu is your best bet. Whether you’re keeping a bullet journal, dream journal, or you’re looking for a food journal app, this has a straightforward user...
We have no reviews of Postproxy yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


- Penzu is an online journal site that can only be accessed with the proper password. Keep a record of abuse on Penzu, and wipe all mention of the site from your browser history. Source: almost 4 years ago
Tracking Postproxy since Feb 2026.
When comparing Penzu and Postproxy, you can also consider the following products.

A simple journal application for the Mac, iPhone, and iPad. AboutTo learn more about Day One, see these two excellent reviews . PublishPublish is not available in Day One 2.
Compare Day One to Penzu or Postproxy:

Social Media API for developers. Post to TikTok, Instagram, YouTube, Facebook & 19 more platforms with one API call. MCP server for Claude/ChatGPT, white-label for SaaS. 70k+ users.
Compare Upload-Post to Penzu or Postproxy:


Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Compare Buffer to Penzu or Postproxy:

Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Compare Evernote to Penzu or Postproxy:

Powerful APIs that enable you to send social media posts effortlessly. Post and manage your users social account via an API.
Compare Ayrshare to Penzu or Postproxy: