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Organization and Description of Business	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Organization and Description of Business	1. Organization and Description of Business Appian Corporation (together with its subsidiaries, “Appian,” the “Company,” “we,” or “our”) provides a low-code platform that accelerates the creation of high-impact business applications and workflows, enabling our customers to automate the most important aspects of their business. The Appian Low-Code Platform unifies the key capabilities needed to get work done faster: Process Mining + Workflow + Automation. Since 1999, industry leaders have trusted Appian and our open, enterprise-grade platform. Global organizations use our applications to improve customer experience, achieve operational excellence, and simplify global risk management and compliance. We were incorporated in the state of Delaware in August 1999. We are headquartered in McLean, Virginia and operate in Canada, Switzerland, the United Kingdom, France, Germany, the Netherlands, Italy, Australia, Spain, Singapore, Sweden, and Japan.

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- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-URI http://asc.fasb.org/topic&trid=2122149

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-URI http://asc.fasb.org/topic&trid=2197479

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