diff --git a/client/src/models/Account.ts b/client/src/models/Account.ts
new file mode 100644
index 0000000..7471e5e
--- /dev/null
+++ b/client/src/models/Account.ts
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+import { AccountDetails, VolatileDetails } from 'jami-web-common';
+
+import { Contact } from './Contact.js';
+import { Conversation } from './Conversation.js';
+
+export class Account {
+  private readonly id: string;
+  private _details: AccountDetails;
+  private _volatileDetails: VolatileDetails;
+  private _contacts: Contact[];
+  private readonly conversations: Record<string, Conversation>;
+  private defaultModerators: Contact[];
+  private devices: Record<string, string>;
+
+  static readonly TYPE_JAMI: string = 'RING';
+  static readonly TYPE_SIP: string = 'SIP';
+
+  constructor(id: string, details: AccountDetails, volatileDetails: VolatileDetails) {
+    this.id = id;
+    this._details = details || {};
+    this._volatileDetails = volatileDetails || {};
+    this._contacts = [];
+    this.conversations = {};
+    this.defaultModerators = [];
+    this.devices = {};
+  }
+
+  static from(object: any) {
+    const account = new Account(object.id, object.details, object.volatileDetails);
+    if (object.defaultModerators) account.defaultModerators = object.defaultModerators.map((m: any) => Contact.from(m));
+    return account;
+  }
+
+  getId() {
+    return this.id;
+  }
+
+  getType() {
+    return this._details['Account.type'];
+  }
+
+  getUri() {
+    return this._details['Account.username'];
+  }
+
+  getRegisteredName() {
+    return this._volatileDetails['Account.registeredName'];
+  }
+
+  isRendezVous() {
+    return this._details['Account.rendezVous'] === 'true';
+  }
+
+  isPublicIn() {
+    return this._details['DHT.PublicInCalls'] === 'true';
+  }
+
+  setDetail(detail: keyof AccountDetails, value: string) {
+    this._details[detail] = value;
+  }
+
+  updateDetails(details: Partial<AccountDetails>) {
+    return Object.assign(this._details, details);
+  }
+
+  getDetails() {
+    return this._details;
+  }
+
+  getDisplayName() {
+    return this._details['Account.displayName'] || this.getDisplayUri();
+  }
+
+  getDisplayUri() {
+    return this.getRegisteredName() || this.getUri();
+  }
+
+  getDisplayNameNoFallback() {
+    return this._details['Account.displayName'] || this.getRegisteredName();
+  }
+
+  getConversationIds() {
+    return Object.keys(this.conversations);
+  }
+
+  getConversations() {
+    return this.conversations;
+  }
+
+  getConversation(conversationId: string) {
+    return this.conversations[conversationId];
+  }
+
+  addConversation(conversation: Conversation) {
+    const conversationId = conversation.getId();
+    if (conversationId != null) {
+      this.conversations[conversationId] = conversation;
+    } else {
+      throw new Error('Conversation ID cannot be undefined');
+    }
+  }
+
+  removeConversation(conversationId: string) {
+    delete this.conversations[conversationId];
+  }
+
+  getContacts() {
+    return this._contacts;
+  }
+
+  set contacts(contacts: Contact[]) {
+    this._contacts = contacts;
+  }
+
+  getDefaultModerators() {
+    return this.defaultModerators;
+  }
+
+  set details(value: AccountDetails) {
+    this._details = value;
+  }
+
+  set volatileDetails(value: VolatileDetails) {
+    this._volatileDetails = value;
+  }
+
+  setDevices(devices: Record<string, string>) {
+    this.devices = { ...devices };
+  }
+
+  getDevices() {
+    return this.devices;
+  }
+}
diff --git a/client/src/models/Contact.ts b/client/src/models/Contact.ts
new file mode 100644
index 0000000..bd526ae
--- /dev/null
+++ b/client/src/models/Contact.ts
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+export class Contact {
+  private readonly uri: string;
+  private readonly displayName: string | undefined;
+  private registeredName: string | undefined;
+
+  constructor(uri: string) {
+    this.uri = uri;
+    this.displayName = undefined;
+    this.registeredName = undefined;
+  }
+
+  static from(object: any) {
+    const contact = new Contact(object.uri);
+    if (object.registeredName) contact.setRegisteredName(object.registeredName);
+    return contact;
+  }
+
+  getUri() {
+    return this.uri;
+  }
+
+  getRegisteredName() {
+    return this.registeredName;
+  }
+
+  setRegisteredName(name: string | undefined) {
+    this.registeredName = name;
+  }
+
+  getDisplayName() {
+    return this.getDisplayNameNoFallback() || this.getUri();
+  }
+
+  getDisplayNameNoFallback() {
+    return this.displayName || this.getRegisteredName();
+  }
+}
diff --git a/client/src/models/Conversation.ts b/client/src/models/Conversation.ts
new file mode 100644
index 0000000..fa72af9
--- /dev/null
+++ b/client/src/models/Conversation.ts
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+import { Message } from 'jami-web-common';
+
+import { Contact } from './Contact';
+
+export interface ConversationMember {
+  contact: Contact;
+  role?: 'admin' | 'member' | 'invited' | 'banned' | 'left';
+}
+
+type ConversationInfos = Record<string, unknown>;
+
+export class Conversation {
+  private readonly id: string | undefined;
+  private readonly accountId: string;
+  private readonly members: ConversationMember[];
+  private messages: Message[];
+  private _infos: ConversationInfos;
+
+  constructor(id: string | undefined, accountId: string, members?: ConversationMember[]) {
+    this.id = id;
+    this.accountId = accountId;
+    this.members = members || [];
+
+    this.messages = [];
+    this._infos = {};
+  }
+
+  static from(accountId: string, object: any) {
+    const conversation = new Conversation(
+      object.id,
+      accountId,
+      object.members.map((member: any) => {
+        member.contact = Contact.from(member.contact);
+        return member;
+      })
+    );
+    conversation.messages = object.messages;
+    conversation.infos = object.infos;
+    return conversation;
+  }
+  static fromSingleContact(accountId: string, contact: Contact) {
+    return new Conversation(undefined, accountId, [{ contact }]);
+  }
+
+  getId() {
+    return this.id;
+  }
+
+  getAccountId() {
+    return this.accountId;
+  }
+
+  getDisplayName() {
+    if (this.members.length !== 0) {
+      return this.members[0].contact.getDisplayName();
+    }
+    return this.getDisplayUri();
+  }
+
+  getDisplayNameNoFallback() {
+    if (this.members.length !== 0) {
+      return this.members[0].contact.getDisplayNameNoFallback();
+    }
+  }
+
+  getDisplayUri() {
+    return this.getId() || this.getFirstMember().contact.getUri();
+  }
+
+  getFirstMember() {
+    return this.members[0];
+  }
+
+  getMembers() {
+    return this.members;
+  }
+
+  addMessage(message: Message) {
+    if (this.messages.length === 0) this.messages.push(message);
+    else if (message.id === this.messages[this.messages.length - 1].linearizedParent) {
+      this.messages.push(message);
+    } else if (message.linearizedParent === this.messages[0].id) {
+      this.messages.unshift(message);
+    } else {
+      console.log("Can't insert message " + message.id);
+    }
+  }
+
+  addLoadedMessages(messages: Message[]) {
+    messages.forEach((message) => this.addMessage(message));
+  }
+
+  getMessages() {
+    return this.messages;
+  }
+
+  get infos() {
+    return this._infos;
+  }
+
+  set infos(infos: ConversationInfos) {
+    this._infos = infos;
+  }
+}