SaaS adoption has proliferated across nearly every industry vertical and business function to the point where it is now nearly ubiquitous throughout the economy. This has created multiple market opportunities for businesses utilizing an “API-first” strategy, whereby they offer new products or services via API that complement existing SaaS applications or they use API technology to break down data silos and connect what would otherwise be disparate data sets. A handful of first-movers have capitalized on a subset of these opportunities in both products & services (e.g., Twilio in voice & text, Stripe in payments) and data aggregation (e.g., MuleSoft for enterprises, Plaid for FinTech / financial institutions). We believe this dynamic is still in its early days and that there will be many future opportunities for growth investors with strong SaaS experience to partner with these businesses. To capitalize on this trend, Catalyst is exploring businesses participating in the “API Economy”, which we define as companies doing any of the following: 1. Pursuing an “API-first” product or go-to-market strategy (e.g., Twilio, Stripe, Algolia, MapBox) 2. Utilizing APIs to connect data silos (e.g., MuleSoft, Plaid, Zapier, Segment, Redox, Trulioo) 3. Enabling the development and maintenance of APIs (e.g., Apigee, Kong, SmartBear) At Catalyst, we employ a proactive, research-based approach to investing, targeting sectors experiencing outstanding growth. If you are an owner, operator, or investor of a growth stage company participating in the API Economy, we would like to hear from you. Please send inquiries and business plans to grady@catalyst.com.

1. The API Economy
January 2019
Grady Kidder & Todd Clapp

2. 2
0
5
10
15
20
2010 2011 2012 2013 2014 2015 2016 2017
Number of Paid SaaS Subscriptions perCompany
SaaS Has Eaten the World…
Data Source: Blissfully.
▪ SaaS is now nearly ubiquitous throughout the
economy
▪ ~800% growth in number of paid SaaS
applications from 2010-2017 (~9x increase)
▪ The average company now pays for ~20
applications
▪ >$200K in average SaaS spend
▪ Each business group within an organization is
now a buyer – no longer being purchased by
select few
SaaS adoption has proliferated across every industry vertical and business function
August 2011
“Software
is eating
the world”
Est. 2010-2017
CAGR: ~37%

3. 3
0
4,000
8,000
12,000
16,000
20,000
0
4
8
12
16
20
2010 2011 2012 2013 2014 2015 2016 2017 2018
TotalPublicWebAPICount
NumberofPaidSaaSSubscriptionsperCompany
Number of Paid SaaS Subscriptions per Company Total Public Web API Count
…Giving Rise to the API Economy
(1) Data set excludes private and partner APIs – true growth is thus understated.
Data Source: Blissfully, ProgrammableWeb.
Twilio
IPO
SendGrid
Series A
SendGrid
IPO
MuleSoft
IPO
Apigee
IPO
Google
Acquires
Apigee
Stripe
Series A
▪ APIs link data between disparate applications
and act as the glue tying together the SaaS
ecosystem
▪ ~925% growth in number of public web APIs
from 2010-2018 (>10x increase) (1)
▪ From 2010-2017, proxies for both SaaS and
APIs grew at nearly identical ~35-40% CAGRs
SaaS growth has created multiple market opportunities for businesses utilizing an “API-first” strategy

4. 4
Communication
Products,
Platforms &
Data
Aggregators
Horizontal Focus Vertical Focus
Payments Digital
Features &
Functionality
Prospect &
Customer
Data
Governance,
Risk &
Compliance
Financial
Services
Healthcare Commerce Other
Horizontal
Integrators
API
Management
Marketplaces Development & Monitoring
Note: this landscape is intended to be a representative sampling and is not an exhaustive list.
Please direct inquiries to grady@catalyst.com
API Integrators
IPaaS
The API Economy Landscape
The “API Economy” is comprised of companies (i) pursuing an “API-first” product or go-to-market strategy (“Products,
Platforms & Data Aggregators”), (ii) utilizing APIs to connect data silos (“Horizontal Integrators”), or (iii) enabling the
development and maintenance of APIs (“API Management”)

5. 5
API
Management
▪ Data integration tools connecting otherwise disparate data and software applications
▪ API Integrators: ‘hub & spoke’ data aggregators sold to SaaS developers – enable developers to offer pre-
built integrations from their SaaS app to other popular apps within an ecosystem
▪ iPaaS: similar to API Integrators, but capable of more technical / complicated integrations
▪ We anticipate these two models will blur over time as feature parity is met and consolidation occurs
▪ Most often sold directly to developers (B2D), or technical business users and I.T. (B2B)
▪ Offer best of breed tools via API for specific use cases
▪ Horizontal: functionality (e.g., communications, payments), features (e.g., search, location mapping, social
feed streaming), or data aggregators (e.g., prospect & customer data; governance, risk & compliance) that
can be sold to businesses across multiple industry verticals
▪ Vertical: products and data aggregators sold to specific industry verticals
▪ Most often sold directly to developers (B2D) or business users / managers (B2B)
▪ Tools sold to developers used to manage their APIs (DevOps for the API Economy)
▪ Marketplaces: online exchanges where developers can search for and purchase best of breed APIs
▪ Development & Monitoring: suites and point solutions for full API lifecycle management (production,
testing, release, maintenance, etc.)
▪ Sold directly to developers (B2D)
The API Economy Landscape
Products,
Platforms &
Data
Aggregators
Horizontal
Integrators
The “API Economy” is comprised of companies (i) pursuing an “API-first” product or go-to-market strategy (“Products,
Platforms & Data Aggregators”), (ii) utilizing APIs to connect data silos (“Horizontal Integrators”), or (iii) enabling the
development and maintenance of APIs (“API Management”)

6. 6
▪ Building direct API connections or connecting into an API marketplace / portal increases TAM
➢ New customer acquisition channels
➢ Access to new markets
➢ Additional products / revenue streams
API Economy Dynamics & Themes
Growth
Opportunities
Outsource Non-
core Skills
Data
Democratization
▪ Licensing best-of-breed products and functionality via API allows developers to spend more
time building their own product / service instead of building everything from scratch
➢ Faster go-to-market
➢ Better end-user experience
➢ Requires fewer internal development resources
➢ Easier to maintain
▪ Follows DevOps trend of modular, microservices development and other BPO trends Catalyst
has previously identified
▪ Data aggregators break silos and connect
disparate SaaS applications, unlocking
value from “trapped” data
▪ Decreases amount of time, energy, and
resources spent gathering and processing
data from different sources
API
There are multiple tailwinds fueling the growth of APIs and accompanying services

7. Please send any inquiries to grady@catalyst.com