Sidekick Tools

4.2
874 reviews
50K+
Downloads
Content rating
Everyone
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About this app

Sidekick Tools (formerly Posh Sidekick) is a reselling automation app for marketplace resellers selling on Poshmark, eBay, Mercari, WhatNot, Etsy, Depop, and Grailed.

It’s like having a Poshmark bot, Mercari bot, eBay automation tools, crosslister, relister, auto offer sender, and much more in one single app.

FREE 7-Day Unlimited Trial. No credit card required.

With the Sidekick Tools app, you don’t have to manually grind because it puts your reselling business on autopilot.

Here are all the amazing automation tools/features within the Sidekick Tools app that help you grow your marketplace sales:
Crosslisting Tool: Cross-post listings across 7 marketplaces.
Poshmark Bot: Does self-shares, party shares, community shares, silent auctions, follow, & unfollow on auto.
Auto Send Offers to Likers (OTL): Automatically sends offers to likers/buyers on Poshmark, eBay, Mercari, & Depop
Mercari Bot: Handles repetitive selling tasks like delisting/relisting items and sending offers to likers.
eBay Automation Tools: Auto sends offers to buyers, delists/relists items, and optimizes listings.
Auto-Delist: Automatically removes sold listings to prevent double-selling.
Relisting Tool: Refreshes and moves old listings back to the top of the marketplace feed.
Automatic Auctions: Runs Poshmark silent shows on autopilot.
Lowball Blocker: Automatically counters offers from buyers.
Bulk Listing Editing Tools: Make changes to multiple listings at once.
AI Stock Photo Creator: Creates stunning AI-generated stock photos for your listings.
Bulk Image Background Remover: Removes cluttered backgrounds from product images in seconds.
Product Description Generator: Generates perfectly SEO-optimized listing content.
Sales Report & Analytics: Helps you manage inventory & listing pricing smartly.


GET STARTED IN 3 EASY STEPS:
1. Create your Sidekick Tools account
2. Link your marketplace shops
3. Activate your services

Download Sidekick Tools now!
Updated on
Feb 21, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info, Photos and videos and 2 others
This app may collect these data types
Personal info and Device or other IDs
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
836 reviews
Danielle Stoffel
December 2, 2025
I've been using Sidekick Tools for a year. The first year and a half of my Poshmark business I hadn't tried any bot. The year of sales with my bot is greater than the year and a half combined! This doesn't even include the sales I've had with Depop, ebay, Mercari and Whatnot. I attribute my success to the daily sharing and auto offers I have set up in my bot. I love waking up to sales this app helped generate overnight, or while I'm busy at work. Highly recommend this app!
10 people found this review helpful
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Carolyn Joy
April 14, 2025
By far the best! I love the platforms available to crosslist. Downside, accounts expire and I have to log in again. There are a few features that I would like to see that my old app had (that makes things even easier). I would like to see a publish option that allows you to choose the time that an item is listed rather than just publishing immediately. Also, I would like there to be an option in inventory to edit a listing across all listed platforms.
14 people found this review helpful
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Krystl Wyatt-Heine
May 3, 2025
I frequently have system glitches, network connection issues, payment issues, and other challenges. Each of these issues causes me to have to re-import my Poshmark closet, re-cross share my items, and reset up other settings. It does not seem to be the most stable platform. However , once you get it set-up, it does help with the sharing, following, and making offers to your customers. Learning each of these apps is not easy, so as long as it is paying for itself with sales I will keep trying.
16 people found this review helpful
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What’s new

Whatnot Follow

Inventory Filters (Colors & Marketplace)

Background Remover in Crosslisting

Depop OTL Automation

Edit Price & Title in Upcoming Relist

Improved Relist & Poshmark navigation

iOS stuck issue fixed