53% of adults in the United States reportedly begin their search for a product by going on Amazon.
Indeed, online marketplaces have changed the way we do things.
The COVID-19 pandemic only spurred on this disruption as more people turned to digital-first consumerism, broke brand loyalty, and sought more personalized experiences.
The B2C e-commerce industry will reap these rewards, generating a projected 3.5 trillion dollars in sales by 2024.
Most of these profits will undoubtedly go to the e-commerce giants that reign supreme from China to the US.
That being said, how do you attract sellers to your online marketplace?
Offer Sellers an Offer They Can't Ignore On Your Website
First, let's discuss why it's essential to work on attracting sellers to your marketplace website instead of immediately gunning for buyers or customers.
According to a Harvard Business School professor, "If you get the right suppliers, the customers will experience high-quality service and then do the marketing for you."
Airbnb did not just choose the suitable suppliers for their platform; they helped transform them into suitable hosts.
Airbnb visited property owners' homes with professional photographers to take great pictures of the rentals and saw their monthly revenues double.
It was so successful that the platform incorporated professional photography for every new listing.
Over time, this has resulted in an annual revenue increase of more than $2400 per unit.
Although they don't feature sellers, Tinder's CMO similarly made an enticing offer to the app's very first set of users.
She traveled and visited different chapters of her sorority, presented, and asked the girls to download the app.
Then, she went to chapters of their brother fraternity and showed the guys the girls from the sororities who had downloaded the app.
The tactic proved to be so effective that by the time she came back from her trip, the number of Tinder users tripled from 5,000 to 15,000.
Uber similarly went all out in recruiting their very first drivers.
Founder Travis Kalanick cold-called black car drivers and asked them to try out the platform for an hourly rate.
Only three of the ten he called agreed.
But it was enough; since then, Uber has grown to have a market cap of $47.10 billion.
While many (or all) of these strategies weren't scalable, they exhibited one crucial aspect of successfully attracting sellers or users to their platforms: making it hard for them to say no.
The correct value proposition can assist in bringing in sellers.
Your value proposition is a concise representation of what your business offers.
About 65% of businesses have established value propositions, but less than 3% of them have compelling value propositions.
One famous example of how it's done right is Uber's "tap the app, get a ride."
Uber then explains why it's "the smartest way to get around."
So in creating your value proposition, focus first on writing a clear and compelling headline.
Follow it up by justifying your bold take through a sub-headline or some bulleted points.
Finally, make it visually appealing.
Another way to make your online marketplace irresistible to sellers is to work your unique selling proposition.
Your USP (unique selling proposition), is a distinct advantage that your platform offers -- that others cannot.
Amazon's is "anything, anywhere, anytime," a difficult proposition for competitors to follow.
To find your USP and successfully position it to attract sellers, a good place to start is to put yourself in a seller's shoes and ask, "What's in it for me?"
List the specific benefits and features that your platform offers. Identify those unique to your marketplace -- and are not or cannot be replicated by your competitors.
Meet Marketplace Sellers Where They Are
Another effective way to generate interest from sellers is to find them where they are.
This is what Etsy did.
In the first days of their launch, their founders scoured through art fairs all over the United States to pitch their platform to the best vendors.
Today, Etsy has 7.5 million active sellers, raking in a revenue of 2.3 billion dollars.
Airbnb also spent extra effort finding their first hosts, although they did it in an arguably less ethical way.
Knowing that rental listing owners would be found on Craigslist, their founders created software to hack the contact information of property owners on the platform, then sent them an invite to their website.
Questionable or not, it worked.
Suppose you can't travel the country to find sellers or hack into a database to get their email addresses. In that case, you can nevertheless join online forums or groups where people of similar interests gather.
Facebook Groups, for example, are an excellent venue for finding your first sellers.
More than 1.8 billion people use them monthly, and community- or city-based groups engender the most sense of belonging, which might make them receptive to your pitch.
Additionally, you can leverage marketing on social media.
Short-form videos, in particular, are considered by 85% of businesses to be the most effective marketing content in 2021.
Attracting Sellers in 2026: What Has Changed Since This Post
The tactics above still work, but the market they work in has changed since 2022. Three shifts matter most for anyone trying to win their first sellers today.
1. The giants are big, but growing slowly
Etsy's revenue went from $2.57 billion in 2022 to $2.81 billion in 2024 and $2.88 billion in 2025. Upwork's barely moved between 2024 ($769.33 million) and 2025 ($787.78 million), according to StockAnalysis (checked October 2026) and its Upwork data. Mature platforms like these are crowded, and new sellers struggle to get seen. That gives you a pitch: on a smaller, focused marketplace, a seller's listings aren't buried under millions of others.
2. Listing on the big platforms is now almost effortless
In March 2026, Meta added Meta AI tools to Facebook Marketplace. They write a draft listing from a photo, suggest a price based on similar local items and auto-reply to buyers. Meta says more than 3.5 million listings are posted every day in the US and Canada. In July 2026 it launched a separate Seller app with bulk listing and a unified inbox, and reported 430 million items listed each month worldwide. Since November 2025, Marketplace has also shown eBay and Poshmark inventory in its feeds. The practical consequence is that serious sellers cross-list everywhere. Your marketplace won't win them by being "another place to post". It has to be easier, cheaper or better targeted than the places they already use.
3. The pool of independent sellers keeps growing
MBO Partners' State of Independence 2026 counts a record 74.9 million Americans earning income independently, almost 6 million of them making more than $100,000 a year. Many of them sell services rather than products: tutors, cleaners, photographers, tradespeople. That supply is often easier to recruit for a local or niche marketplace than product sellers are.
Putting it into practice
- Seed the supply yourself. Ask a few partners (a dealer, an agency, a club) for their existing catalog and import it with their permission, so the first visitors don't land on an empty site. On Yclas, for example, you can bring in listings and users from a CSV file. Don't copy the Craigslist trick described above. Contacting people with scraped data damages trust before you've earned any.
- Make posting faster than on the platforms sellers already use. Keep only the fields buyers really filter on, and test posting a listing from a phone in under two minutes.
- Offer what the giants can't. That might be a narrow audience, local visibility, verified buyers or category-specific fields (mileage, bedrooms, certifications) that generic platforms don't have.
- Keep posting free at launch and earn money from optional extras (featured or bumped listings, seller plans) once buyers are coming.
- Pick one niche and one area first. A marketplace that is busy in one category and one town is more useful to buyers and sellers than one that is thin everywhere. Expand once the first area works.
Time Your Marketplace Launch to Coincide with Other Events
Know when to launch!
Timing accounts for 42% of success across 200+ businesses, making it an essential element to pin down.
According to Entrepreneur.com, two essential factors to consider when you're ready.
First: is your business idea in demand currently?
In 2021, Shopify says that among the most profitable business ideas were handmade products, thrift clothes, print-on-demand services, and drop shipping.
Now your online marketplace does not need to deal in any of these, but the lesson still applies: your market should be ready for what you're going to offer to find interested sellers and, from there, people who want to buy.
Another factor to consider is whether you can positively contribute to meeting or addressing change in business demand.
Jack Ma, the founder of Alibaba, initially laid out the groundwork for what would become a 165-billion dollar company when he noticed a lack of Chinese businesses engaged in e-commerce.
Soon after, he pooled investments from other tech pioneers to launch a website for Chinese businesses -- and was rewarded by more investments from other Chinese people in the industry who appreciated what he was trying to do.
Today, Alibaba enjoys 69% of domestic e-commerce retail revenues and is projected to reach 3.62 trillion dollars in e-commerce sales by 2025.
In the case of software, is your software ready to be launched?
It doesn't mean it has to be perfect, as you can make iterations as you go along, but it needs to be correctly working for it to have a chance.
An article in the Harvard Business Review notes that the biggest reason why a product launch fails is the failure to market too late.
Also, think about your sales cycles; when does your audience seem to need the product the most? Or when would they best benefit from it?
Tuesday is the best day of the week for launching a product; if you decide to embark on a Tuesday, make sure it's not after a major holiday.
Yclas
Want to learn more about marketplaces? Start with a free trial, and get to know the Yclas marketplace platform.
