Chapter 4. Helium: A Blockchain-Based Wireless Network
The first major [blockchain] breakthrough was bitcoin, which invented digital gold. The second was Ethereum, which introduced general-purpose smart contracts. Helium presents the most ambitious new use case for blockchains we’ve seen since Ethereum.1
—Kyle Samani, managing partner, Multicoin Capital
Helium was no longer just hot air.
As CEO Amir Haleem looked over the crowd of several hundred people who had filled Austin’s trendy La Condesa restaurant for the August 2019 Helium launch party, he was overwhelmed by the enthusiastic response of all these early users who were eager to build The People’s Network. After months of marketing and promotion, participants had come from all over Texas to pick up their Helium Hotspots. Helium was now a real shipping product, not just vaporware.
As Amir conversed with members of the crowd, he noted some were blockchain enthusiasts, some were Internet of Things (IoT) experts, and some were just geeks who wanted to be part of this groundbreaking experiment. These early users would be building a massive wireless network not on phone company towers, but on small wireless devices located in their offices and bedrooms. In return, they’d be paid in blockchain-based Helium tokens.
These little Hotspots, in other words, would be minting money.
Knowing that the strength of any blockchain project is user adoption—getting people to join your blockchain—Amir understood that this small but committed tribe of early adopters would be key to kickstarting the initial wireless coverage for the Helium network. This was a critical time to achieve critical mass, and Helium tokens were the hook.
As the party attendees returned home and began to plug in their Hotspots, Amir monitored the growth of the network over the next several days. As he saw each Hotspot blip to life on his digital map of Austin, each widening the circle of coverage, he felt a mixture of pride and relief that the dream he and his team had envisioned six years ago was finally becoming a reality.
One side of his marketplace—the network—was lighting up, but the other side was still shrouded in darkness. It was a classic technology problem: they were building supply, but would there be enough demand? Would the company be able to find customers who wanted to use this new low-cost, lower-power wireless network, or would Helium ultimately tank?
The Helium Origin Story
Founded in 2013 by Amir Haleem, a championship video gamer, and Shawn Fanning of Napster fame, Helium’s original business idea was to create a giant wireless network, like a cellular network, but for the low-cost, low-power, low-bandwidth world of sensors. Before the Internet of Things was even a thing, the two entrepreneurs saw that tiny sensors would soon be embedded in millions of devices: thermostats, fire alarms, kitchen appliances, inventory trackers, and maybe eventually your dog.
All these devices had one thing in common: they would need a low-cost, low-power wireless connection to the internet (Figure 4-1).
By 2014, Amir and Shawn’s idea had evolved into creating a wireless network out of millions of hotspots. These hotspots would connect with hotspots around them, like repeaters that boost a wireless signal within your home, creating a kind of decentralized mesh network. Instead of the cell towers of centralized phone companies (large and expensive), a network of volunteers would host mini cell towers that connected to each other (small and inexpensive).
The idea of a decentralized network was taking hold in Cuba, where citizens were fed up with the slow and expensive internet service provided by the state-owned telecommunications company. With a do-it-yourself work ethic, citizens formed a grassroots Street Network, eventually known as SNET, hosted by a huge network of volunteers who set up and maintained wireless stations from their homes and apartments across the island.2
But that was Cuba; this was the US, where internet service was already cheap and fast. If Helium wanted to blanket the country with its own wireless network—a US version of SNET—how could the team convince people to set up hotspots, much less install them in high windows or rooftops where they would get maximum coverage?
The Helium founders had a few other false starts, but the extra time worked in their favor. By 2016, their prediction had come true: an ecosystem of small devices needed to connect to the internet. Scooters. E-bikes. Lawn sprinklers. And yes, even your dog (or at least your dog collar). The Internet of Things was officially a thing.
- Battery life
- Measured in years, not hours
- Small enough to fit on many devices (scooters, dog leashes, etc.)
- Location tracking
- Without needing an expensive cellular connection
- Long range
- The ability to connect over entire cities
- Secure enough to transfer sensitive personal data (the location of your pet or valuables)
The extra time worked in their favor in another way: as many television stations switched to digital, they were auctioning off their unused bandwidth spectrum. At the same time, the US Federal Communications Commission (FCC) was opening up new wireless frequencies that didn’t require a license. As the entrepreneurs saw it, these devices would need only a slice of that spectrum, and there was plenty of it.
They had a model of what they wanted: a nationwide network of Helium Hotspots, which they came to call The People’s Network. But how would they get the people to build the network? How could they get these Hotspots to sell like hotcakes?
It was Shawn, the Napster creator, who first said it as a joke: “What if we could get these things to mine bitcoin?”
Solving the Chicken-or-Egg Problem
By offering blockchain-based tokens, Helium incentivizes anyone to own a Hotspot and provide wireless coverage—so the network belongs to participants, not a single company. A network can be scaled much faster and more economically than if a single company tried to build out infrastructure.
—Dal Gemmell, Helium head of product marketing
In their simplest form, blockchains use a two-sided marketplace: bitcoin, for example, has buyers and sellers. But how do you build a two-sided marketplace? Buyers can’t buy if there are no sellers, and vice versa. It is the classic chicken-or-egg problem: which comes first?
Chicken-or-egg problem: When building a two-sided blockchain marketplace (buyers and sellers, or buyers and miners), which comes first, the chicken (miners) or the egg (buyers)? One solution: pay off the chickens.
Bitcoin began by attracting enthusiasts who built the network, who were rewarded in turn with small amounts of bitcoin. At first, they bought and sold this bitcoin from each other for fractions of a penny—but as their numbers grew, so did the network, and so did their net worth. As the price of bitcoin grew, more buyers attracted more sellers, and vice versa (Figure 4-2).
The lesson: to kickstart its blockchain, Helium needed to reward the Hotspot owners. When users plugged in a Hotspot (i.e., when they created a new node on the network), they’d earn money. The company would create a blockchain-based token—the Helium token—to reward users for building the network, for holding their nodes.
Mining: As we covered in Chapter 2, this is a powerful word that now means paying users small rewards for supporting the network. Like mining gold, mining requires “work” (like setting up and maintaining a Hotspot), and a reward is not always guaranteed (that reward may go to a nearby Hotspot instead of yours).
By framing Hotspot ownership as mining, Helium was creating a new mental model of money. Now it was in miners’ best interest to not only install Hotspots but also configure them for optimal coverage, since they would also earn Helium tokens for the data that passed through each Hotspot. In fact, Helium Hotspots were an investment opportunity for landlords and businesses with multiple properties (Figure 4-3).
Helium minted its own money—the Helium token—to motivate users to build out one side of the marketplace. The next problem was how to build the other side. Assuming these Helium tokens were worth real money, where would that money come from? In other words, who would pay to use this thing?
As it turned out, there were a lot of Things that would pay to use this thing.
An Internet for the Internet of Things
Package delivery. Rental returns. Supply chains. Energy metering. Temperature sensors. As the team envisioned from the beginning, all these internet-connected devices were potential use cases for the Helium network (Figure 4-4). For manufacturers of these connected devices, Helium had several advantages over existing solutions:
- Operating cost
- Whereas a sensor that connected to the 3G cellular network would cost a few dollars per month,3 a sensor connected to the Helium network would cost a few pennies per month. For companies with millions of sensors, the cost savings were enormous.
- Bluetooth sensors worked at only short ranges, as anyone with a Bluetooth phone headset can attest. The Helium network could provide connectivity several miles away from the nearest Hotspot.
- Whereas cellular chips kill batteries (think about how often you charge your cell phone), the Helium sensors could last several years.
- All communications over the Helium network would have end-to-end encryption, meaning it was suitable for sensitive data. Even though ordinary users were funneling packets of data through their Hotspots, that data was scrambled so they couldn’t read it.
- With a traditional centralized telecom, your data plan gets more expensive every year (as users increase, the company has to invest in more infrastructure). With the Helium decentralized network, it grows organically as more Hotspots are added, driving costs down.
After securing a $16 million round of funding, the entrepreneurs built a team of hardware, software, and blockchain experts, with a small business development team that began to search for prospective customers, including the following:
- Bike and scooter rental companies
- Rental apps for pedal bikes, electric bikes, and scooters were growing quickly. One of their challenges was the short lifespan of their vehicles, which were relatively expensive to maintain and replace. In some cities, users could drop off a scooter anywhere, leaving vehicles scattered across the city. Helium sensors could help rental companies keep track of inventory—as well as provide valuable usage data for peak rental times and neighborhoods.
- Food and beverage delivery
- Water delivery companies wanted monitoring devices on machines so they could quickly replenish water jugs and eliminate unneeded deliveries from their routes.4 Any business operating vending machines or automated kiosks could use the same technology to notify the delivery company when an item was out of stock.
- Smart trackers
- Another emerging industry was smart pet collars, with a low-cost sensor that allowed owners to keep track of their pets and easily locate missing animals through a downloadable app. This was potentially a huge market, since similar location trackers could be developed for children, the elderly, or those with special needs. Location trackers could also be used for package deliveries, rental cars, and anti-theft devices.
- Wildfire detection
- In places where it isn’t fiscally feasible for traditional telecom providers to build infrastructure to reach remote wilderness areas, a Helium network could be created to cover vast areas of forest for just a few thousand dollars. Hotspots connecting to sensors that monitor temperature (heat) or air quality (smoke) could easily detect and notify firefighters and forest rangers before these fires got out of control.
- Sensors could guide farmers on which crops to grow, at the optimal time of year, in order to maximize yields. Helium sensors could collect data from automated irrigation devices and transmit it back to cloud-based control centers.5 Given the small profit margins generated by many farms, this data could be a matter of survival for family farms—and the future of agriculture.
With the growing list of use cases, the Helium team realized that a proprietary technology would probably get limited reception: customers would not want to be locked into a solution from a single company and would likely work toward a global standard (like 3G).
So Helium made a critical decision: it would become the global standard. The company made a bold move, in the spirit of the decentralized blockchain, by open sourcing the design of the Hotspot, the sensors, and the software. Other companies would be free to manufacture their own Hotspots; anyone could build on the Helium network. By opening up the technology to everyone, the company placed a big bet that Helium would take off (Figure 4-5).
But first, the technology had to actually work.
The Hotspot Heats Up
At the heart of this decentralized network was the Helium Hotspot, a small hardware device about the size of a smartphone, using a new long-range, low-power wireless protocol. The result was a $500 consumer-focused network node that was easy to set up and configure through a user-friendly smartphone app.
The company hired product development experts who put a great deal of effort into the look and feel of the app. Helium wanted a seamless, user-friendly experience for configuring and maintaining Hotspots, so anyone could own one—not just hardware geeks and blockchain wonks. In addition to hiding the complexity of the network behind a simple interface, they designed the app (see Figure 4-6) to provide friendly, colorful, real-time stats on how much wireless traffic each Hotspot was routing.6
Maximizing range was critical for making the network usable, because Hotspot coverage could be dramatically impacted by location, building materials, and radio wave interference. A Hotspot in San Francisco, for example, might have a range of about two to three miles, meaning Helium would need about 150 Hotspots to cover the city. In rural areas, however, the range could extend out to ten miles.
To achieve this range, the Helium team had to develop a new wireless protocol called LongFi, a kind of long-range WiFi. It allowed any IoT device to connect to any Hotspot—up to thousands of devices per Hotspot—and transmit data back and forth over long ranges while maximizing battery life.8
But that wasn’t enough. The protocol also had to be decentralized, meaning it had to:
Set up without third-party assistance or verification
Connect and send data without centralized validation
Send payment from devices to Hotspots without intermediaries
In typical networks, a centralized figure often provides access to the network (like your network admin). Helium’s decentralized wireless protocol (LongFi) and its decentralized hardware (the Helium Hotspot) allowed for unlimited growth of the network, without a central authority.
Even the sensors were decentralized. Let’s imagine a scooter rental company using the Helium network to track a fleet of scooters: it would receive a unique ID to be used across all its scooter sensors, with all Hotspots trusting that ID. This enabled sensors to “roam” without needing to reauthenticate. A rented scooter moving through a city, for example, would always stay logged into the network.
LongFi was built to transfer small packets of data, not for the high-bandwidth requirements of smartphones or computers. But LongFi, unlike WiFi, didn’t require you to keep logging in. Any authenticated sensor on any Helium Hotspot could be trusted. As COO Frank Mong explained, the system is permissionless, meaning a username and password are not needed, as trust is stored on the decentralized blockchain.9
Permissionless: A confusing term that means not requiring permission. Permissionless systems do not require a username and password because the permission (i.e., the trust or authentication) has been stored on a blockchain.
The two-sided marketplace was coming together, with network “owners” on one side, and network “users” on the other. As Figure 4-7 shows, Helium was a set of open source hardware and software standards that sat in the middle.
Miners hoped Helium tokens would rise in value, like an investment. But buyers wanted a fixed price. A scooter rental company, for example, wouldn’t use a technology that cost 5 cents per device this year, and 10 cents per device next year.
The solution was to create two separate tokens: Helium Network Tokens (HNT) and Data Credits (DC). Whereas HNT could change in value (like an investment), DC would be a stable unit of purchasing power to use the network (like a currency). Think of these as mining tokens and usage tokens (Figure 4-8).
Here the company made an important decision: HNT would be created only when users did real “work.” Whereas most blockchain projects begin with a fixed amount of pre-mined tokens, HNT tokens would be created only when users set up Hotspots, validated other Hotspots, or had data transferred over their Hotspots.10 We call this idea token creation = value creation, represented by the equation Tc = Vc.
A best practice is to create new blockchain tokens only when a valuable unit of work has been performed (like validating a transaction on the blockchain). We generally do not recommend pre-mining tokens (creating a bank of tokens at the outset), or awarding tokens in airdrops (free giveaways), as these do not encourage building long-term value.
On the other side of the marketplace, companies could use the Helium network by purchasing DC tokens, which gave them predictable costs and avoided crypto concerns such as how the DC tokens would be classified by regulators. A Data Credit was true to its name: literally, a credit that allowed you to transfer 1 byte of data over the network, denominated in US dollars.
The Helium team made another critical decision: Data Credits could be acquired only by burning, or deleting, Helium Network Tokens. This process was managed through a burn-and-mint equilibrium developed by Multicoin Capital.11 The fixed price of DC, based on market analysis, was set at $0.0001 per data fragment, or around 24 to 32 cents per megabyte.
Burning and minting: Two sides of the same virtual coin. Minting is creating a new token; burning is destroying it, or removing it from circulation. (Think of it like creating and deleting a file.)
As HNT was converted into DC through this burning process, those HNT were eliminated from circulation. Thus, Helium’s monetary policy was market driven; that is, it was based on who was actually using the system. Theoretically, the more people who used the Helium network, the more tokens would be removed from the system, thus making the existing tokens more valuable—and providing an incentive for more Hotspots (Figure 4-9).
In theory, as the demand for HNT tokens increases, the price of HNT should also increase. However, because Data Credits can’t be sold to other users, customers can be confident that DC will maintain their value.
In summary, Helium’s tokenomics were designed to create price stability for customers through the DC usage token, while still allowing miners to make money with the HNT mining token. Whereas the DC was nontransferrable, the HNT could be bought and sold freely, and perhaps later even sold on digital exchanges at a profit. Miners, of course, were hoping that the price of HNT would slowly rise.
Funding and Team
Throughout this six-year journey, Helium pivoted several times but always tried to solve the same problem: simplifying the process of connecting small, low-bandwidth devices to the internet on batteries that will last for years, with sensors that connect over miles. The company completed three rounds of venture funding:
- Series A funding
- $16 million from Khosla Ventures, with participation from FirstMark Capital, Digital Garage, Marc Benioff, SV Angel, and Slow Ventures12
- Series B funding
- $20 million from GV (formerly Google Ventures), with participation from Khosla Ventures, FirstMark, and Munich RE/Hartford Steam Boiler Ventures13
- Series C funding
- $15 million from Union Square Ventures, Fred Wilson, and Multicoin Capital
One of the key takeaways from the Helium story is the importance of a consistent vision—both inside the company and with outside investors—even while the product pivots. This vision had to be both large and compelling enough to attract all the partners needed to build this massive ecosystem.
Distributed Systems Blockchain Team (six to seven employees)
Wireless Protocol Team (six to seven employees)
Mobile App Team (two to three employees)
Hardware Manufacturing (largely outsourced, with two employees managing the vendor)
Business Development (four employees, each assigned a geographical region)
In summary, Helium’s business model had two sides. On one side, Helium paid tokens to miners for helping build and maintain the network. On the other side, Helium provided services and support for companies that wanted to use that network (similar to Red Hat software, which offers services and support for the open source Linux). In this two-sided business model, Helium empowered the people to create a network that companies paid to use. Helium didn’t own that network; the people who own the Hotspots do. The company was, in a sense, creating a network only to give it away.
But it all came down to getting network coverage: without a network of sufficient size, Helium would be nothing but vaporware.
The company chose Austin, Texas, as the site for the initial launch. As a rising technology hub, Austin had plenty of wireless technology early adopters and blockchain enthusiasts. It was a prime location for innovators, startups, and investors. And Austin had local companies that were interested in piloting Helium (Lime, the scooter rental company, was already lined up).
Helium determined it would take about 100 to 150 Hotspots to provide full coverage for the city. Within a month, the company had exceeded that goal, with 200 Hotspots installed in Greater Austin—enough coverage for the entire city. By offering a user-friendly product with blockchain-based rewards, Helium doubled its minimum goal, convincing users to install enough $500 Hotspots to provide wireless coverage for the city of Austin.
As Amir eagerly checked and rechecked his map of Austin to watch new Hotspots coming online, he reflected on the company’s success:
Helium tokens were now being earned for real work.
Data was being transmitted from sensors over the network.
The burn-and-mint equilibrium was working properly.
Hotspot owners were happy with the user-friendly apps and customer support.
The solution was now stress-tested and ready to be rolled out to other cities.
- Stick to your knitting
- Even as the product pivots, keep to your overarching principles (decentralized, open source, permissionless networks) that are consistent with your vision for the project.
- Focus on the frontend
- While good backend blockchain developers are critical, be sure to hire a team capable of hiding the complexity of blockchain in a well-designed, user-friendly product.
- Build open and scale quickly
- As most blockchains will become a winner-takes-all or winner-takes-most scenario, lean toward making blockchain projects that are open and free. (Remember the principle of network effects from Chapter 3.)
- Design tokenomics carefully
- Be sure that tokens are created only when value is created, and think through the needs of both sides of your marketplace, the chicken and the egg.
- Keep it simple
- To reach the mass market, your blockchain ultimately needs to be easy to explain and understand. When it’s not possible to keep it simple, hide the complexity (Figure 4-10).
The larger the network, the more valuable it becomes.
—Amir Haleem, Helium CEO
The telecommunications industry was ripe for disruption. Amir knew that when The People’s Network reached a critical mass, the blockchain-based network would become a powerful disruptive force, democratizing network access and distributing wealth to the masses. As Amir watched new Hotspots lighting up on his map of Austin, he pondered the company’s next move (Figure 4-11).
How could the company rapidly scale The People’s Network, making sure both sides of the marketplace stayed in sync?
Should Helium seek additional IoT applications, including wearable technology and personal security? If so, on which of the many IoT applications should Helium’s business development team focus its efforts?
Should Helium consider listing its token on digital exchanges? This would increase demand for HNT, providing more liquidity for buyers and sellers. But listing on digital exchanges was expensive and time-consuming, and no one could predict how the market might price HNT.
Should Helium even be in the hardware business, or should the company partner with a manufacturer to take its open source designs and produce Hotspots at scale, enabling Helium to focus on blockchain and software?
1 Guillermo Jimenez, “Helium’s Trial Balloon: A New Peer-to-Peer Wireless Network Goes Live in Austin,” Decrypt, August 1, 2019, https://decrypt.co/8179/helium-trial-balloon-a-new-peer-to-peer-wireless-network-goes-live-in-austin.
2 Antonio García Martínez, “Inside Cuba’s DIY Internet Revolution,” Wired, July 16, 2017, https://www.wired.com/2017/07/inside-cubas-diy-internet-revolution.
4 Amir Haleem, “Entering the Next Phase of Helium,” The Helium Blog, Medium, August 3, 2019, https://blog.helium.com/entering-the-next-phase-of-helium-cfd7df3c6e3.
5 Haleem, “Entering the Next Phase of Helium.”
6 Brady Dale, “Crypto-Powered IoT Networks Are on Their Way to Over 250 US Cities,” Yahoo! Finance, September 24, 2019, https://finance.yahoo.com/news/crypto-powered-iot-networks-way-120050824.html.
8 Dal Gemmell, “Learning about LongFi,” The Helium Blog, Medium, August 28 10, 2019, https://blog.helium.com/learning-about-longfi-4b7b36c9bf54.
10 Haleem, “Entering the Next Phase of Helium.”
11 Samani, Kyle, “New Models for Utility Tokens,” Multicoin Capital, February 13, 2018, https://multicoin.capital/2018/02/13/new-models-utility-tokens.
13 “Helium Raises $20 Million Series B Funding Round to Accelerate Smart Sensing Solutions,” Business Wire, April 25, 2016, https://www.businesswire.com/news/home/20160425005330/en/Helium-Raises-20-Million-Series-Funding-Accelerate.