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What Is a Startup Accelerator? Comprehensive Guide, Examples and How They Work

scientists in a lab representing a startup accelerator providing help to a startup

In the ever-evolving landscape of startups, the term "accelerator" has garnered significant attention. Not to be confused with "incubators," accelerators offer a unique blend of mentorship, funding, and resources to fast-track a startup's development. This article aims to provide a comprehensive understanding of what an accelerator is, its advantages, examples, how it differs from similar concepts, and why startups should consider joining one.

Table Of Contents

  • What Is An Accelerator

  • History and Evolution

  • Examples

  • How Does It Work?

  • Advantages of Joining An Accelerator?

  • How Is it Different than an Incubator?

What Is An Accelerator?

An accelerator is an organization designed to help startups succeed by providing mentorship, resources, office space and helping secure funding in exchange for equity or money. The primary aim is to speed up the startup’s journey from concept to market-ready product or service. Accelerators run for a fixed term, usually 3-6 months, during which intensive mentorship and networking opportunities help the startup hone its business model and offerings.

History and Evolution

The concept of accelerators dates back to the early 2000s, with Y Combinator launching in 2005 as one of the pioneers. Since then, several other renowned accelerators such as Techstars, 500 Startups, and Seedcamp have emerged. While the Y Combinator is more successful and prominent than ever, there are some changes in newer accelerators. For example, some are nothing more than paying for access to online classes and coaches, while others are more like labs funding new and innovative technologies and ideas.

Accelerator Examples

  • Y Combinator: Based in Silicon Valley, Y Combinator is one of the most prestigious startup accelerators. It has backed successful companies like Airbnb, Dropbox, and Reddit.

  • Techstars: Techstars is another well-regarded accelerator with programs in various cities around the world. Companies like SendGrid and ClassPass have gone through Techstars.

  • 500 Startups: Based in San Francisco, 500 Startups focuses on early-stage companies and has a broad global reach, with various programs and initiatives worldwide.

  • Seedcamp: Located in London, Seedcamp is one of Europe's leading accelerators and has backed successful startups like TransferWise (now Wise) and UiPath.

  • Startupbootcamp: With programs in several cities around the world, Startupbootcamp is a global accelerator that focuses on a variety of industry verticals.

  • MassChallenge: Based in Boston, MassChallenge is a not-for-profit accelerator that does not take equity. It supports early-stage startups across multiple sectors.

  • SOSV Accelerators: SOSV operates multiple accelerator programs like HAX (hardware), IndieBio (biotech), and Chinaccelerator (internet/mobile). They focus on specific verticals and offer targeted support.

  • AngelPad: Founded by ex-Googlers, AngelPad is a mentorship program that takes a hands-on approach with its startups, focusing on helping founders on a more individualized basis.

  • Plug and Play: Known for its corporate partnerships, Plug and Play is a global innovation platform that runs accelerator programs across various sectors and countries.

  • INSEAD LaunchPad: Run by the renowned business school INSEAD, this accelerator targets its alumni, focusing on early-stage ventures and providing a network of investors, mentors, and resources.

How Does It Work?

  1. Application Process: Startups apply to be a part of the accelerator program.

  2. Selection: A panel selects the most promising startups.

  3. Investment: The accelerator invests a small amount of capital in the startup.

  4. Program: The startups undergo a rigorous program that includes mentorship, training, and development.

  5. Demo Day: At the end of the program, startups pitch to investors on Demo Day to secure further funding.

Advantages of Joining An Accelerator

There are a number of advantages to joining an accelerator, including:

  • Seed Funding: Many accelerators offer seed funding in exchange for equity. This initial capital can be crucial for startups looking to validate their business models, build prototypes, or enter the market.

  • Mentorship: Accelerators often provide access to industry experts, successful entrepreneurs, and investors who can offer guidance, feedback, and insights that can significantly accelerate a startup's growth.

  • Networking Opportunities: Being part of an accelerator program can provide you with valuable connections, not just with mentors but also with fellow entrepreneurs, alumni of the program, and investors who could be beneficial for your startup's growth.

  • Credibility and Exposure: Graduating from a well-known accelerator can add significant credibility to your startup. Additionally, demo days and other public events give you a platform to showcase your product or service to a broader audience, including potential investors and customers.

  • Skill Development: The rigorous curriculum often includes workshops, lectures, and one-on-one sessions that focus on various aspects of business such as marketing, product development, and business strategy. These help in upskilling the startup's team.

  • Market Validation: Accelerators can help you validate your business model more quickly through rapid iteration. This enables you to adapt to market needs and validate your business model at a much faster pace than you could independently.

  • Operational Support: Many accelerators offer free or discounted services such as legal advice, accounting, or cloud services, relieving some of the operational burdens from the startup.

  • Peer Support: Being part of a cohort going through the same highs and lows can be a significant morale booster. Peer-to-peer learning is also a valuable form of education, as startups can learn from each other's experiences and mistakes.

  • Accountability: The structured environment and timeline of an accelerator program can instill a sense of urgency and discipline, making it easier to achieve milestones and keep the startup on track.

  • Access to Resources: Some accelerators offer physical workspaces, manufacturing facilities, or labs that startups can use. This can be particularly useful for startups requiring specialized resources that are otherwise expensive to access.

  • Global Reach: For startups looking to go global, some accelerators offer the chance to connect with mentors, investors, and industry experts from different parts of the world, providing an international perspective and potential market reach.

Before opting to join an accelerator, it's advisable to weigh these advantages against potential downsides to decide whether it's the right path for your startup.

Downsides of Joining an Accelerator

Joining a startup accelerator can offer various advantages, including mentorship, funding, and networking opportunities. However, there are also downsides to consider:

  • Equity Stake: Most accelerators require an equity stake in your company, typically ranging from 5% to 10%. This dilutes the ownership for the founders and early team members. Ensure that the benefits you're getting are worth the equity you're giving up.

  • Time Commitment: Accelerator programs are often intense and require a substantial time commitment. This may distract from other aspects of building the company, such as product development or customer acquisition.

  • Standardized Curriculum: Accelerators usually have a one-size-fits-all curriculum that may not cater to the specific needs or challenges of your startup. Some aspects may be irrelevant, leading to wasted time and resources.

  • Pressure and Pace: The fast-paced environment and constant push towards milestones can lead to burnout and may not give you the time needed for reflection or strategy development.

  • Cohort Quality: Your experience in an accelerator is often shaped by the quality of your cohort, or the other startups in the program with you. A less talented or motivated group could mean fewer valuable connections and a weaker support system.

  • Mentor Whiplash: You'll likely get advice from multiple mentors, and their opinions may conflict. Sorting through these mixed messages can be confusing and stressful.

  • Potential for Copycats: In an environment where everyone is sharing their ideas, there's a risk that someone else in the accelerator (or connected to someone in the program) could start a competing venture.

  • Market Perception: While some investors see accelerator participation as a stamp of approval, others may consider it a sign that you needed help to succeed, which could potentially devalue your company's perception in the market.

  • Geographical Constraints: Some accelerators require you to move to a specific location for the duration of the program, which might not be feasible for all founders.

  • Hidden Costs: While you may receive initial funding from the accelerator, there could be hidden costs such as travel, accommodation, or specialized resources needed for the program that aren't covered.

Before joining an accelerator, it's essential to weigh these downsides against the potential benefits to make an informed decision that's right for your startup.

How is it Different from an Incubator?

While both accelerators and incubators aim to support startups, there are key differences:

  • Duration: Accelerators are short-term, whereas incubators can support startups for several years.

  • Investment: Accelerators usually invest capital in exchange for equity, which is not always the case with incubators.

  • Focus: Accelerators emphasize speed and scale, while incubators focus more on the ideation phase.

Who Should Consider Joining An Accelerator?

Startups with a validated business model and a scalable product or service are ideal candidates. If you're beyond the ideation phase and are looking to scale quickly, an accelerator could be highly beneficial.


Accelerators provide a critical stepping stone for startups looking to scale quickly. With intensive mentorship, initial funding, and a robust network, they offer a conducive ecosystem for startups to thrive and reach their full potential. Therefore, choosing the right accelerator could be one of the most significant decisions a startup makes in its early stages.


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