
Apollo.io
lemlist
SmartLead.ai
Reply.io
Mailshake
ZoomInfo
Hunter.io
Build your own infinitely scalable cold email outreach system with Instantly.

AlternativeTo
Product Hunt
SaaSHub
Slant.co
Startup Stash
Alternative.me
BetaList
StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.

Which is more popular?
Stackshare might be a bit more popular than Instantly.ai. We know about 26 links to it since March 2021 and only 21 links to Instantly.ai.
Website, pricing, platforms and company facts side by side.
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| Website | instantly.ai | stackshare.io |
| Pricing | — | |
| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Instantly Review - Creating A B2B Email Campaign With Instantly
More videos
[500 STARTUPS DEMO DAY 2015] BATCH 14, StackShare
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Instantly.ai and Stackshare. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


What is the best MCP server for sales teams in 2026? toflow.ai is the most complete MCP server for sales in 2026, covering ICP search, account research, enrichment, sequence enrollment, and outreach across email,...
Instantly.ai is a dynamic AI-powered engagement platform that automates interactions with website visitors in real time through intelligent chatbots. It specializes in qualifying leads, answering inquiries, and...
Instantly.AI focuses on cold email outreach with features that allow businesses to scale their email campaigns efficiently. It helps to increase deliverability, automate follow-ups, and manage outreach campaigns at...
Stackshare is a developer-centric platform that allows users to explore, compare, and build stacks using popular software tools. With a strong focus on developers, Stackshare offers an excellent opportunity to...
StackShare offers insights into the technology stacks of various companies, including SaaS products, tools, and services used, aiding businesses in technology decision-making, providing valuable insights for software...
Recommendations tracked on public social media and blogs since March 2021.


I rebuilt my outreach this week after my reply rate tanked from 4% to <1%. Pulled fresh data from 5+ deliverability blogs (Autobound, MarketingProfs, HyperGen, Instantly), built a Python validator to enforce the new rules across 70+... - Source: dev.to / 5 months ago
Instantly was my final selection given its API was the most robust and well documented. It gave claude full access to campaigns, leads, and sequences while also being capable of sending webhooks on reply and unsubscribe events. - Source: dev.to / 9 months ago
Anywho, the old mailgun system was able to send emails immediately + had images in them. The recommendations we got were to remove ALL images, and instantly.ai has to delay a few minutes between email. So the emails get out slower and no... Source: about 3 years ago
For web apps, see https://stackshare.io/ For many desktop apps, if you go into Help > About, you'll see a list of all the open source libraries used, and their associated licenses (as required by the license). In Chrome, go to... - Source: Hacker News / about 2 years ago
Stackshare - Aimed for companies building their technical stack. - Source: dev.to / over 2 years ago
I don't know much about 'influencers' but https://builtwith.com/ is good for seeing what some public facing website is built with, https://stackshare.io/ tends to have a little more information about backends of sites and... Source: over 3 years ago
When comparing Instantly.ai and Stackshare, you can also consider the following products.

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AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
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The prospecting tool to automate multichannel outreach & actually get replies.
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A website that lets users share and discover new products
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Find and promote software that will help you grow your business or to be more productive.
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