Explore FounderStack Directory

Acuity Scheduling lets service businesses manage online bookings, payments, reminders, and client information. It suits solo professionals, consultants, and teams that manage appointments.

Alternative to:Calendly

TidyCal is an online scheduling tool for sharing booking pages, syncing calendars, and accepting payments through Stripe or PayPal. It suits freelancers, consultants, coaches, and small businesses that schedule appointments.

Alternative to:Calendly

SavvyCal is an online scheduling tool with calendar overlays, availability controls, meeting polls, and team booking. It suits founders, consultants, and sales teams coordinating meetings with clients.

Alternative to:Calendly

Cal.com is a scheduling platform for booking meetings, coordinating calendars, and automating appointment workflows. It serves solo founders, sales teams, and developers building scheduling into their products.

Alternative to:Calendly

Calendly lets individuals and teams share booking links and schedule meetings based on their availability. It suits founders, sales teams, consultants, and businesses that book calls regularly.

Alternative to:Acuity Scheduling

Fathom Analytics is a privacy-focused website analytics platform that tracks traffic, conversions, and campaigns without cookies. It suits founders and teams wanting straightforward reporting and a Google Analytics alternative.

Alternative to:Google Analytics

Plausible Analytics is a privacy-focused website analytics platform with real-time traffic reports, conversion tracking, and audience insights. It suits founders and teams who want actionable website metrics without complex analytics dashboards.

Alternative to:Google Analytics

Umami is an open-source web and product analytics platform that tracks traffic, campaigns, events, and conversions without cookies. It suits founders who want privacy-conscious analytics with cloud hosting or self-managed infrastructure.

Alternative to:Google Analytics

PostHog is a product analytics and developer platform for tracking user behavior, debugging issues, and testing product changes. It helps startup founders and engineering teams make data-informed product decisions using integrated analytics and development tools.

Alternative to:Google Analytics

Google Analytics tracks how people use websites and apps, including traffic sources, engagement, and conversions. It helps founders and marketing teams measure acquisition, evaluate campaigns, and understand user journeys.

Alternative to:Fathom Analytics

Investors Club is a marketplace for buying and selling online businesses, including SaaS, content websites, and ecommerce stores. It helps founders discover acquisition opportunities or sell existing digital businesses.

Alternative to:Acquire.com

Flippa is a marketplace for buying and selling online businesses, SaaS products, ecommerce stores, websites, apps, and domains. It helps founders find acquisition opportunities, value businesses, and manage transactions.

Alternative to:Acquire.com

Transferslot is a curated marketplace connecting owners of profitable side projects with potential buyers. It helps indie founders explore businesses for sale or find buyers for their existing digital products.

Alternative to:Acquire.com

Buy Sell Startups is a marketplace for acquiring and selling micro-SaaS businesses, startups, and digital assets. It connects founders and buyers directly without charging a commission on completed sales.

Alternative to:Acquire.com

Microns is a managed marketplace for buying and selling profitable micro-startups, SaaS products, apps, and online businesses. It helps founders find acquisition opportunities or sell projects with transaction support.

Alternative to:Acquire.com

SideProjectors is a marketplace for buying, selling, and showcasing side projects, including SaaS products, websites, and apps. It helps indie founders discover projects, find collaborators, or sell their work.

Alternative to:Acquire.com

TrustMRR is a startup revenue database and acquisition marketplace for SaaS founders, indie hackers, and buyers. It verifies revenue through connected payment providers and supports startup listings, offers, and acquisitions.

Alternative to:Acquire.com

Acquire.com is a marketplace where founders list online businesses for acquisition and buyers discover companies to purchase. It provides listing tools, buyer access, and resources for managing acquisition deals.

Alternative to:TrustMRR

Lemon Squeezy is a merchant of record for digital products and SaaS, handling payments, taxes, subscriptions, and licensing for online businesses.

Alternative to:Paddle

Twist is an async team communication app from Doist. It organizes work discussions into channels and threads for teams that want fewer interruptions and more focused collaboration.

Alternative to:Slack

Element is an encrypted messaging and collaboration app built on Matrix. It suits teams that need self-hosting, data control, and interoperable communication.

Alternative to:Slack

OVHcloud provides public cloud, dedicated servers, web hosting and infrastructure services for startups, developers and businesses.

Alternative to:Amazon Web Services (AWS)

Vultr is a cloud infrastructure platform offering compute, GPUs, storage, bare metal, and Kubernetes. It targets developers, startups, and businesses.

Alternative to:Amazon Web Services (AWS)

InterServer provides web hosting, VPS, dedicated servers and colocation for websites, applications and infrastructure workloads. It serves individuals, businesses and developers.

Alternative to:Amazon Web Services (AWS)

DigitalOcean is a cloud platform for developers, startups, and growing businesses. It provides virtual machines, managed databases, Kubernetes, storage, and application hosting.

Alternative to:Amazon Web Services (AWS)

Hetzner provides cloud, dedicated servers, storage and hosting for developers and businesses, with hourly or monthly billing and API-based infrastructure management.

Alternative to:Amazon Web Services (AWS)

Outrank automates keyword research, SEO content creation, publishing and backlink building for businesses that want to grow organic traffic with less manual SEO work.

Alternative to:Soro

AutoSEO automates keyword research, SEO content creation, publishing and backlink building for small businesses that want ongoing organic search growth.

Alternative to:Soro

Arvow automates SEO research, content creation, publishing, technical optimization and backlink building. It is built for marketers, agencies and businesses.

Alternative to:Soro

Soro automates keyword research, SEO content creation, optimization, and publishing. It is built for businesses that want consistent organic content without managing the workflow manually.

Alternative to:Distribb

Zulip is an open-source team chat platform with topic-based conversations, built for teams that need organized, searchable communication.

Alternative to:Slack

Rocket.Chat is a team collaboration platform with messaging, calls, integrations, and automation. It supports organizations that need self-hosting, data control, or secure cloud deployment.

Alternative to:Slack

Mattermost is an open source collaboration platform for technical and operational teams with messaging, calls, workflows, and integrations. It supports self hosted and cloud deployments.

Alternative to:Slack

Slack is a team communication platform for messaging, meetings, files, workflows, and app integrations. It supports startups through enterprise organizations.

Alternative to:Twist

Kelviq is a Merchant of Record and monetization platform for SaaS, AI, and digital products. It combines payments, subscriptions, usage-based billing, entitlements, global tax handling, checkout, and digital product delivery in one platform.

Alternative to:Paddle

Semrush is a broad online visibility and digital marketing platform for researching keywords, analyzing competitors, auditing websites, tracking rankings, managing backlinks, creating content, and monitoring brand visibility across search engines and AI platforms. It is used by startups, businesses, agencies, marketers, and enterprise teams.

Alternative to:Ahrefs

Ahrefs is an SEO and marketing platform used to research keywords, analyze competitors, audit websites, track rankings, research backlinks, discover content opportunities, and monitor visibility in AI search. It is used by SEO professionals, marketers, agencies, businesses, and content teams.

Alternative to:Semrush

Serpstat is an SEO and search marketing platform that helps businesses, marketers, and agencies research keywords, analyze competitors, track rankings, audit websites, analyze backlinks, and plan content. It also provides keyword clustering, local SEO, AI content tools, API access, and AI search visibility features.

Alternative to:Semrush

SE Ranking is an SEO platform for agencies, businesses, and in-house marketing teams. It combines keyword research, rank tracking, competitor research, website audits, backlink analysis, content tools, local SEO, reporting, and AI search visibility tracking in one platform.

Alternative to:Semrush

Mangools is an SEO toolkit that combines five core tools: KWFinder for keyword research, SERPChecker for SERP analysis, SERPWatcher for rank tracking, LinkMiner for backlink analysis, and SiteProfiler for SEO metrics and domain research. It is aimed at solopreneurs, freelance SEOs, marketers, teams, and agencies.

Alternative to:Keyword Insights

Keyword Insights is an SEO and content intelligence platform that uses live, location-specific SERP data to cluster keywords, identify search intent, discover content opportunities, create content briefs, and generate AI-assisted content. It is designed for SEO professionals, content teams, agencies, and businesses managing large keyword sets.

Alternative to:Mangools

LowFruits is an SEO keyword research and SERP analysis tool focused on finding long-tail, low-competition keywords. It helps users generate keyword ideas, analyze Google search results for weak competitors, group related keywords, research competitor keywords, and track rankings.

Alternative to:Mangools

Distribb is an AI SEO platform for businesses, startups, agencies, and founders that want to automate organic growth. It researches buyer-intent keywords, creates SEO content, publishes it to supported CMS platforms, builds backlinks through its business network, and tracks visibility across Google and AI search.

Alternative to:Soro

Amazon Web Services (AWS) is a broad cloud computing platform providing compute, storage, databases, networking, security, containers, serverless computing, AI, and many other infrastructure services. Developers can use services such as EC2 for virtual servers, Lightsail for simpler VPS hosting, and Lambda for serverless applications.

Alternative to:OVHcloud

Vercel is a cloud platform for building, deploying, and scaling modern web applications. It provides automated CI/CD, a global CDN, serverless and fluid compute, preview deployments, application security, observability, and infrastructure services, with particularly strong support for Next.js and modern JavaScript applications.

Alternative to:Clever Cloud