Stories linking everyone in Telecom
Love, Robots, P2A Messaging

Having a Love Chat with a Robot 🤖💐 P2A Messaging by RGTN

Table of Contents

Today’s P2A messaging story opens a new chapter for the Connector. On the PortaOne website (which our blog team calls “the mainland”), you can find dedicated sections for success stories and case studies from our customers. This blog will also talk about our customer stories, but we’re going to do it slightly differently. Here, we want to show the human factor behind each “case” and “success.” What does it take to be a founder of a flourishing modern telco? And how can we structure the vendor–telco relationship to ensure it bears fruit over the long term?

ChatGPT has been trending for several months now. Meta, Baidu, and Microsoft have also attempted to launch AI-powered conversations. However, with the recent outages reported by OpenAI (ChatGPT’s operator), reliability and availability also came into public focus. So, in this story, we will discuss the technology of peer-to-application (hence, P2A) messaging. This technology is over six decades old; most humans (even those with minimal understanding of a mobile phone) know how to use it. (Thank you, SMS.)

Our guide in this P2A messaging journey will be Leonardus “Leslie” Herps, founder and CEO of Redworks and RGTN, telecom veteran, and a long-time customer of PortaOne. Mr. Herps comes from Maastricht in the Netherlands.

Leslie Herps explains how RGTN learned to enable and monetize P2A messaging traffic worldwide at PortaOne vCC22 — our virtual customer conference last November. 

The Origins of P2A Messaging

While messaging went mainstream in the mid-1990s with SMS and ICQ, the technology is over half a century old. In fact, the first computer messages were P2A. Here’s how it all began.

The P2A Messaging Creation Myth: E.L.I.Z.A. Met PARRY

In 1961, scientists at MIT launched the Compatible Time-Sharing System (CTSS). E.L.I.Z.A. was the first chatbot to use computer messages via CTSS. Joseph Weizenbaum created E.L.I.Z.A. in 1966. According to MIT News, Mr. Weizenbaum “grew skeptical of artificial intelligence after creating a program that made many users feel like they were speaking with an empathic psychologist.”

E.L.I.Z.A — the AI psychotherapist before it was cool and the earliest successful case of P2A messaging.

The following “proto chatbot” after E.L.I.Z.A. was PARRY, a.k.a. “E.L.I.Z.A. with attitude.” Created at Stanford by Kenneth Colby in 1972, PARRY was “a computer model of paranoia.” The first P2A messages and AI/ML went viral among experimenting psychotherapists. The obvious mashup was PARRY visiting doctor E.L.I.Z.A.


Around the same time as E.L.I.Z.A. Tom Van Vleck and Noel Morris (also of MIT) wrote the “mail” command for the CTSS. Released in 1965, the “mail” command allowed users to send files to each other. Then, in 1971, SNDMSG and READMAIL programs for the TENEX operating system introduced the traditional email syntaxis as we know it today, namely: the “Subject,” “To,” and “CC” headers. That was the same year Ray Tomlinson, an author of READMAIL, sent the first email to himself.

A brief interview with Raymond Tomlinson, the creator of email. Here, he explains “the @ sign” and the origins of email technology. Ironically, the first emails were P2A messages: when Mr. Tomlinson debugged his “killer app for the ARPAnet.” 

Over the 1970s, email slowly became the default digital communication mode in the nascent ARPANET (later Internet). In 1980, Jon Postel and Suzanne Sluizer published RFC 772 for the Mail Transfer Protocol. This became the Simple Mail Transfer Protocol (SMTP) In 1981 — the same email protocol still in use today. In 1984, Joyce K. Reynolds published the first specification of the Post Office Protocol (POP1). After several revisions, this protocol grew up to become POP3 in 1988. In 1986, Mark Crispin designed the Internet Message Access Protocol (IMAP); the current version of this protocol is IMAP4.

A lot of P2A messaging at this stage of the development of email technology helped users do things that are now automated. Numerous email newsgroups began to appear, covering a range of subjects from local events to “eating less meat” (hello, Meat/Less). You had to send P2A messages to a newsgroup server to subscribe, unsubscribe or change settings.

Hotmail and Gmail

On July 4, 1996, Sabeer Bhatia and Jack Smith launched HoTMaiL (if you look closely, you can spot HTML). The symbolic launch date symbolized “liberation from the hegemony of the ISPs.” Then, in December 1997, Microsoft purchased Hotmail for $400 million. Hotmail was revolutionary: you did not have to pay for it, and it wasn’t tied to any telco (the usual practice at those times).

Around the same time, Google became the new rising star of the Internet. In April 2004, the Cupertino giant launched Gmail, an innovative email service that redefined web-based email and email technology in general. The author remembers when you had to “find the right person to get a Gmail invite.” There was even a “black market” for Gmail invites, with prices as high as $150. As of 2021, the number of active monthly Gmail customers was close to 2 billion, turning Gmail into the most significant email service in the world.

Here’s a great video explaining Gmail’s visual (and essential) evolution. It also covers Gmail’s UI and its slow morph into Google Workspace. P2A messaging is essential in various automation scenarios: auto-complete for sentences or automatic parsing of your train ticket into Google Calendar.

The Future of Email (in the Context of P2A Messaging)

Hotmail and Gmail gave rise to the webmail (that is, “web-” or “browser-based” email) revolution. Gmail gracefully revolutionized it toward becoming one of the earliest browser-based apps. In modern times, P2A messaging has become an integral part of webmail. You can use it to track shipments, avoid banking overdrafts, upgrade airline seats, and leave reviews. (Admittedly, that last one is slightly more complicated via email.)

Modern AI/ML tools like Xatkit can automatically process and respond to your routine emails. That’s P2A messaging when your contacts might not even realize it’s P2A! We should expect some regulations obliging businesses to disclose when customers are talking to a robot instead to a natural person. At least that robot might be a friendlier customer service representative, as robots don’t (usually) have “bad days.”

“Merry Christmas!” and the First SMS

While most telecom innovations (Bell’s telephone, Morse’s telegraph, the Eniac, the Internet, and — ultimately — iPhone and Android) come from the United States, SMS, or Short Messaging Service, is a genuinely European 🇪🇺 invention. Friedhelm Hillebrand from Warstein and Bernard Ghillebaert from Alsace offered a concept of SMS in 1986 as a part of the Global System for Mobile Communications (GSM) standard. The idea was to use the idle signaling capacity of the telecommunications network to transfer messages between customers across the network.

Friedhelm Hillebrand explains the 160-character limit. Still, it was never a barrier to P2A messaging. Computer/SMS chatbot commands or brief status requests from a customer are usually quite concise.

The first SMS was delivered in December 1992. The message was “Merry Christmas!” According to the BBC, Neil Papworth, a telecommunications engineer at Vodafone, “sent it to one of the firm’s bosses, Richard Jarvis, who was at a Christmas party. He did not get a reply.” In 2022, an average of 19B messages were sent daily via SMS technology. Unfortunately, the P2A ratio among those is currently unknown because of the billing inconsistencies for P2A traffic. (More on that soon.)

“The Native Brand-Neutral Default”

“Since the mid-2000s, we’ve heard that ‘app X’ will be the SMS killer. But as of early 2023, it hasn’t happened,” explains Mr. Herps. The reasons are straightforward: SMS is a brand-neutral technology, while WhatsApp, iMessage, Messenger, Telegram, and Viber are not. What happens when you install one of the big5 messaging apps? You receive an activation SMS to link your mobile account! So, Mr. Herps concludes, “SMS is here to stay for quite some time. However, there might be some substantial revisions to the SMS standard within the foreseeable future.”

A great explainer by Techquickie on why SMS is still popular (and alive). P2A messaging brings the new native brand-neutral experience to customer communication with many modern brands, including Tesla.

How Should You Bill P2A Messaging Traffic?

While there’s a lot of content covering P2P and A2P traffic, you won’t find much info on P2A. What’s the reason? Well, it’s because nobody knows how to bill it. Since the rise of IoT and SMS marketing, telcos have started implementing various bulk SMS initiatives and have separated the messages generated by machines from those created by humans. So, how do you bill a P2A message, which is just a command (say, to check an account balance, track a parcel, or postpone a visit to a doctor)?

When you consider the billions of messages processed by a bulk SMS aggregator or the business operating an API for SMS marketing, things get more complex. The 0.00001 difference might end up as thousands of US dollars or euros. “We are currently in litigation with one of the major European telcos regarding P2A billing,” explains Mr. Herps. We will keep you posted on the outcome.

The Key Players in P2A Messaging

Major telcos better sort things out, as experts project that the joint A2P and P2A messaging market will reach $116B by 2030 at a 7.11% CAGR, according to January 2023 research by Unfortunately, even the brightest global analysts need help seeing a huuuge difference between A2P (hello, 2FA from the 2000s) and P2A messaging (hello to you, chatGPT from 2023). It’s like seeing B2B and B2C as similar concepts because most letter and number characters look similar. (Any European who has tried learning a character-based language will understand us. ⚓️🈷️)

Aggregators for P2A Messaging

International bulk messaging services such as MessageBird, Telnyx, Retarus, and negotiate and aggregate bulk SMS traffic agreements with telcos worldwide and provide an SMS API to their customers. Interestingly, a notable European SMS bulk aggregator has Ukrainian origins. Swiss-based Global Message Services AG was headquartered initially in Kyiv.

The “OTT Vikings”

The lucrative messaging business couldn’t pass unnoticed by the “cloud wolves” (hello, Amazon, Apple, Google, Meta, and Microsoft) and the “telecom wiz kids of 2010s” who are now “venture grownups” struggling to meet the expectations of the market and their strategic acquirers (hello, Twilio and Vonage).

Amazon SNS

Amazon is the only “cloud wolf” without an actual messaging app. However, they hugely compensate for that with their Simple Notification Service (please don’t be misled by the word “simple” here — it’s enormous), which is part of AWS. Since its launch in 2010, SNS has aggregated impressive global coverage (which comes at a price).

Interestingly, while SNS announces A2A and A2P capabilities straight from the main page, they are quiet about A2P. Why? Well, it’s that same billing dilemma again. However, smart people have (as always) already discovered workarounds. The problem is that while your developers might be happy with using the SMS gateway of the top cloud service, your accounting department might not be so happy. You might discover the reason for that yourself if you play around with the AWS Pricing Calculator for SNS.

Apple Messages for Business

Apple launched its Business Chat service in 2018. The idea is straightforward: capitalize on iMessage’s competitive advantages for businesses willing to sell to iOS, macOS, and watchOS (or whatever else “NewAppleDeviceOS”) customers. Intended initially to fight WhatsApp in the US market, Apple Business Chat later became Apple Messages for Business (AMB) and is now an international initiative. Apple doesn’t charge its customers for AMB directly; third parties (such as Zendesk) charge businesses for the integration with AMB.

Google (and RCS)

A logical question a curious reader might be asking by now is this: Where is SMS 2.0? Well, it’s here. GSMA launched the Rich Communication Suite (RCS) industry initiative in 2007. There was a steering committee, expert meetings, etc. It all could have lasted forever. However, in 2011, Apple launched iMessage. By 2016 it was serving up to 200k iMessages per second. Google needed to match iMessage with a similar feature for Android.

Fast forward a decade, and by 2018 Google was still figuring out how to do it. In 2015, Google acquired Jibe, considered “an RCS unicorn” by many. Hence, the Jibe Platform. Google’s contribution to RCS arrived in November 2020 with E2EE. That became available worldwide except (can you guess it? well, right): China and Russia.

Amir Sarhangi (then the CEO of Jibe Mobile) explains why Jibe is an excellent solution for RCS, including the RCS-based P2A messaging.

Jibe operates the RCS Business Messaging (BM) service via a network of regional partners. Obviously, local spammers quickly recognized the potential in RCS BM. In 2022, Google had to stop RCS BM in India because of those spammers. Nevertheless, RCS has huge prospects as a (not really, but still) brand-neutral successor to SMS. As of mid-2022, Apple was refusing to provide any interoperability with RCS.

WhatsApp Business

Meta (back then, Facebook, Inc.) acquired WhatsApp for $19B in 2014, making it one of the most significant acquisition transactions in the history of mankind. In January 2018, WhatsApp released a standalone app called WhatsApp Business. Meta currently operates WhatsApp Business Cloud API on behalf of WhatsApp. In the summer of 2022, Meta launched its new WhatsApp Business Platform.

Listen from 1:05, where Jan Krutzinna explains ChatClass. That’s a great use case of P2A messaging for the chatGPT-like platform in the world of education.

WhatsApp Business Platform is the first case of an OTT Viking openly taking P2A messaging seriously. It’s a smart move, given the current P2A messaging boom (provoked by the chatGPT hype) and the raw data showing that automated business messaging will have doubled from 2018 levels by 2024.

Facebook Messenger for Business and Instagram Direct

FMB and Instagram Direct are rival siblings of WhatsApp Business. What is Meta’s goal in keeping all three? Each sibling targets a different customer segment and protects a separate revenue stream from competitors. WhatsApp competes with the “traditional OTT messengers,” such as Telegram, Viber, or Line. For Instagram Direct, the native access to Facebook’s Graph API and beyond enables Instagram to compete better with TikTok, Snapchat, and BeReal.

Here’s an excellent House of Takura story by Facebook for Business videographers. “I get direct messages all the time,” explains the brand owner, who “left Sierra Leone at a young age for a better life in the US.” Well, we forecast that in several years P2A messages will also start arriving to this young entrepreneur.

However, the “three siblings” aren’t isolated anymore. Meta recently implemented a cross-platform messaging feature between Messenger and Instagram. You can also use Messenger API for Instagram to improve customer communication workflows. In early 2022, Meta publicly released a feature connecting WhatsApp Business accounts with a Facebook page. Messenger and Instagram rely on Facebook Pages and Instagram for Business profiles to monetize their in-app messaging traffic.


After the retirement of Skype for Business in 2021, Teams became Microsoft’s flagship for P2A messaging. Customers can use a list of P2A commands to organize their SMS chats. We covered Teams and Microsoft strategy in UCaaS and CPaaS a year ago. It looks like Microsoft is still following that strategy in 2023. However, their current priority still looks like voice, not P2A messaging. 


If you don’t know Twilio, here’s a story covering its origins and struggles. In short: Twilio is a pioneer in communication APIs (and a long-term partner of AWS). They offer two products in messaging: the Programmable Messaging API for transactional messaging and the Conversations API for support and marketing conversations between human beings.

Whoah there! That’s too fast for a voiceover, Twilio, especially when English is not your mother tongue. Other than that: what a great SMS API tutorial! Including those interested in using it for P2A messaging.

Someone at Twilio wrote a great article explaining the same thing we are trying to discuss here in this story: build a ChatGPT-like SMS chatbot with OpenAI and Python! However, that article got deleted several weeks later. It looks like Twilio does not want you to build a competitor to ChatGPT for some reason. But we do 😉. (RGTN and PortaOne, please continue reading.)


In this blog, we’ve already covered the story of Vonage (the forever No. 2 in the world of “telecom wiz kids of 2010s”), explaining how and why Ericsson acquired it. Vonage offers one of the industry’s most potent SMS APIs (which comes at a price).

Here’s a Vonage video explainer for their SMS API. Unfortunately, it doesn’t mention P2A messaging, although their support is familiar with it and the company wrote an explainer article for its support repository.

Integration Apps — the case of HubSpot

While aggregators simply sell SMS bulk and (whenever possible) OTT messaging like crude oil, and the OTT Vikings are always inviting you to their “next big thing” or ecosystem, integration apps offer the next degree of convenience for end customers. HubSpot SMS bots are a great example.

Solutions such as SeaX by Seasalt,, GoHire,, and others act as middleware between SMS aggregators and various OTT platforms on one side and the existing customer-facing apps (such as HubSpot CRM) on the other. We hope to deliver some of those via our Add-on Mart this year. And that brings us to this story’s final (and most important) chapter.

How Do You Monetize P2A?

This question brings us back to where we started: the success story of Mr. Herps and his team at RGTN. While there are a lot of existing market players, they are primarily focused on simple business models: SMS bulk aggregation and APIs to proprietary OTT ecosystems (WhatsApp, Messenger, iMessage, Instagram Direct, etc.). Meanwhile, the middleware waters are an ocean of opportunity (see the HubSpot case above).

“The recent achievements in natural language modeling bring many new opportunities to willing entrepreneurs,” explains Leonardus Herps. “Our tandem with PortaOne provides these new entrants with the technology (PortaSwitch) and the P2A messaging expertise (RGTN).”

Andriy Zhylenko, CEO of PortaOne, expands on this idea: “What makes the RGTN offering strong is that PortaSwitch comes with ready-to-use billing in mind,” he says. “Many platforms and aggregators offer you great APIs. However, they are built around generating their profit. RGTN and PortaSwitch built our offering around generating profit for you.”

We asked Mr. Herps and Mr. Zhylenko to tell us what they think might be the most compelling use case for P2A messaging. 

Leslie Herps: Why Did Tesla Reclaim the Old Good SMS?

“Tesla is one of the world’s most technologically advanced car manufacturers, right? Yet it uses 30-year-old SMS technology to connect with its customers. Whenever I need a new windshield or want to update my car’s firmware, I use the Tesla mobile app. Then Tesla sends me an SMS, to which I can reply. There are no URLs, tracking numbers, phone calls, or waiting for the next available representative. You simply reply to an SMS and get another SMS with the necessary advice,” explains Mr. Herps.

“Press both scroll wheels until the touchscreen is black,” explains the Tesla support video. Fast forward to 0:56 to see how Tesla organized the P2A messaging scenario for their support. Interestingly: Tesla uses a regular SMS for the roadside emergency assistance scenario and its built-in messenger for non-emergency communication (you can still opt-in for SMS). 

“I can even respond via SMS if my car’s firmware update takes longer than expected. They will advise on the best option: cancel, drive, wait for an update, or finish installing. You can also send an SMS to your local Tesla vendor for a spare part, and they will come to your front door with it.

“If you need to postpone for any reason, just send another SMS, and you will get a reply in human language: no customer support case ID, no calling and waiting at the support line. You send and receive messages whenever it’s convenient for you. Being in the telecom business, I also understand how this asynchronous approach saves their customer support resources for something more meaningful. It’s a wise combination of A2P and P2A messaging traffic.”

Andriy Zhylenko: How Did a Metal Fan Vote at the Eurovision Song Contest?

“Being a lifelong fan of heavy metal (GitHub: truemetal74), my interest in Eurovision is purely professional,” jokes Andriy Zhylenko. Nevertheless, like it or not, Eurovision is a powerful new audience generator for talented pop bands. Since 2003, Ukraine has won Eurovision three times (Ruslana, Jamala, and Kalush Orchestra). That’s a unique outcome no other country has achieved in this song contest since the 2000s. (Ireland was a winner three times in a row; that was in the 1990s, though.) 

A song that launched the “pink Panama hat” 🏖 trend worldwide. Kalush got a lot of their votes via Eurovision’s P2A messaging gateway.

How Is Eurovision Similar to the US Presidential Elections?

Showbiz = scandals (and sandals). Therefore, you can imagine why the voting system at Eurovision is more complicated than the US presidential elections. And it gets updated once every several years to ensure fraud resistance (and to enable the content writers to compete for the “best Eurovision new voting system text or video explainer.”)

To make this long story short: (1) viewer votes decide what countries qualify for the semi-finals; (2) viewers in non-participating countries can vote online; (3) jury votes are combined with votes from the global audience to decide the final result.

Televoting and How P2A Messaging Helps

Five countries-participants of EBU introduced Eurovision televoting in 1997 as an alternative to a traditional jury system. Fans can vote by calling or texting the short numbers displayed on a TV screen during the show broadcasts. By 2004 all participating countries were using televoting. In 2013, Eurovision introduced mobile apps (Android and iOS). Among other features, customers of those mobile apps can televote for their favorite songs. Germany-based Digame is EBU’s long-term partner for televoting.

Televoting did not always go rosy-cozy. In 2008, EBU introduced a series of changes to its Eurovision SMS televoting system in the UK after the phone-in scandal, a.k.a. the Richard and Judy controversy. The essence of the debate was simple, as usual: 

  1. The key players in the televoting ecosystem admitted to overcharging their customers (telecom network subscribers).
  2. Technology providers influenced the televoting outcome in favor of certain contestants.
A Panorama investigation into the UK’s phone-in scandal. Let’s add soap opera-style drama to a quiet P2A messaging story discussing technology and APIs! 😂 The uploader rescued this footage from a VHS tape (according to the YouTube video description). 

In 2022, Australia became the first country participant to allow only in-app voting via its dedicated digital platform. Spoke Interactive claims to be behind this move. Within the next several years, we will likely see Eurovision’s P2A messaging evolve further and at a massive scale. 


P2A messaging is huge already, and it is going to grow exponentially during the next decade. If you are considering your “next big telco thing” after VoIP, P2A messaging might be a great starting point. At PortaOne, we help companies such as RGTN build a reliable and cost-efficient technology stack for their new (and existing) business models. We invest in long-term relationships and elegant solutions. That’s why customers like Leonardus Herps stay with us (and stay in business) for decades. Please visit our website to find your relevant product offering, or contact to discuss how our team can help.

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