1.6% 51-100
14.5% 11-50
The New Banking Stack:
Microservices and API
architecture choices
The complexity of banking IT infrastructure is creating a backlog that
means many banks are still only halfway through a modernization
program. REST APIs and the open API specification format are slowly
becoming standard technology choices, but there is still some work to
do to reorient all existing architecture.
Number of estimated internal
services (N=66)
Number of SOAP APIs (N=62)
How many APIs do you have amongst
those internal services? (N=63)
Number of REST APIs (N=62)
Don't know 7.6% None 4.6%
None 7.9%
25.8% 500+
6.5% 500+
16.1% 101-500
12.3% 500+
9.5% 500+
21.5% 101-500
15.9% 101-500
51-100% 51-100
19.7% 100-500
6.5% 6-10
15.4% 51-100
50-99 16.7%
1-5 21%
11-50 16.9%
11-50 22.2%
11-50 15.2%
None 33.9%
6-10 12.3%
6-10 7.9%
Under 10 15.2% 1-5 16.9%
1-5 20.6%
20
State of the Market report 2018
